Patent Publication Number: US-11656443-B2

Title: Photographing lens assembly, imaging apparatus and electronic device

Description:
RELATED APPLICATIONS 
     The present application is a continuation of the application Ser. No. 17/064,644, filed Oct. 7, 2020, which is a continuation of the application Ser. No. 15/822,312, filed Nov. 27, 2017, U.S. Pat. No. 10,838,173 issued on Nov. 17, 2020, which claims priority to Taiwan Application Serial Number 106124172, filed Jul. 19, 2017, which are herein incorporated by reference. 
    
    
     BACKGROUND 
     Technical Field 
     The present disclosure relates to a photographing lens assembly and an imaging apparatus. More particularly, the present disclosure relates to a photographing lens assembly and an imaging apparatus with enhanced imaging functionality in an off-axis region, a large aperture configuration, and a compact size while being applicable to electronic devices. 
     Description of Related Art 
     With the broadening application of photographing modules, the installation of the photographing modules in various intelligent electronic products, entertainment devices, fitness devices and smart home systems is an upward trend of future technical development. However, with the advance of science and technology, as well as the improved functionality of the electronic products, such as smartphone, the consumer demand for camera functions is also increasing (such as night photography, photographs of fast motion or depth of focus). It is known that conventional optical lens modules have difficulty satisfying the demands of a large aperture and short total track length simultaneously. Particularly, the result of photographing the off-axis region of an image is highly dictated by the aperture size. Therefore, it is the goal for manufacturers in the industry to enhance the image quality in the off-axis region while maintaining a short total track length. 
     SUMMARY 
     According to one aspect of the present disclosure, a photographing lens assembly includes seven lens elements, which are, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The second lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. The seventh lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The image-side surface of the seventh lens element includes at least one convex shape in an off-axis region thereof, and the object-side surface and the image-side surface of the seventh lens element are aspheric. When a sum of central thicknesses of the lens elements of the photographing lens assembly is ΣCT, a central thickness of the fourth lens element is CT4, a sum of axial distances between every two lens elements of the photographing lens assembly adjacent to each other is EAT, an axial distance between the sixth lens element and the seventh lens element is T67, a focal length of the photographing lens assembly is f, a curvature radius of an object-side surface of the fourth lens element is R7, and a curvature radius of an image-side surface of the sixth lens element is R12, the following conditions are satisfied:
 
2.0&lt;(ΣCT/CT4)+(ΣAT/ T 67)&lt;9.5;
 
0≤ f/R 7; and
 
0≤ f/R 12.
 
     According to another aspect of the present disclosure, an imaging to apparatus includes the photographing lens assembly according to the aforementioned aspect and an image sensor, wherein the image sensor is disposed on an image surface of the photographing lens assembly. 
     According to further another aspect of the present disclosure, an electronic device includes the imaging apparatus according to the aforementioned aspect. 
     According to yet another aspect of the present disclosure, a photographing lens assembly includes seven lens elements, which are, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The second lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. The fourth lens element has positive refractive power. The sixth lens element has positive refractive power. The seventh lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The object-side surface of the seventh lens element includes at least one concave shape in an off-axis region thereof, and the image-side surface of the seventh lens element includes at least one convex shape in an off-axis region thereof. The object-side surface and the image-side surface of the seventh lens element are aspheric. When a sum of central thicknesses of the lens elements of the photographing lens assembly is ΣCT, a central thickness of the fourth lens element is CT4, a sum of axial distances between every two lens elements of the photographing lens assembly adjacent to each other is ΣAT, an axial distance between the sixth lens element and the seventh lens element is T67, a focal length of the photographing lens assembly is f, a curvature radius of an object-side surface of the sixth lens element is R11, and a curvature radius of an image-side surface of the sixth lens element is R12, the following conditions are satisfied:
 
2.0&lt;(ΣCT/CT4)+(ΣAT/ T 67)&lt;9.5;
 
0≤ f/R 11; and
     0≤f/R12.   

     According to still another aspect of the present disclosure, a photographing lens assembly includes seven lens elements, which are, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The second lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. The seventh lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The image-side surface of the seventh lens element includes at least one convex shape in an off-axis region thereof, and the object-side surface and the image-side surface of the seventh lens element are aspheric. When a sum of central thicknesses of the lens elements of the photographing lens assembly is ΣCT, a central thickness of the fourth lens element is CT4, a sum of axial distances between every two lens elements of the photographing lens assembly adjacent to each other is ΣAT, an axial distance between the sixth lens element and the seventh lens element is T67, a focal length of the photographing lens assembly is f, a curvature radius of an image-side surface of the third lens element is R6, and a curvature radius of an image-side surface of the sixth lens element is R12, the following conditions are satisfied:
 
2.0&lt;(ΣCT/CT4)+(ΣAT/ T 67)&lt;7.5;
 
0 ≤f/R 6; and
 
0≤ f/R 12.
 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present disclosure can be more fully understood by reading the following detailed description of the embodiments, with reference made to the accompanying drawings as follows: 
         FIG.  1    is a schematic view of an imaging apparatus according to the 1st embodiment of the present disclosure; 
         FIG.  2    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 1st embodiment; 
         FIG.  3    is a schematic view of an imaging apparatus according to the 2nd embodiment of the present disclosure; 
         FIG.  4    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 2nd embodiment; 
         FIG.  5    is a schematic view of an imaging apparatus according to the 3rd embodiment of the present disclosure; 
         FIG.  6    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 3rd embodiment; 
         FIG.  7    is a schematic view of an imaging apparatus according to the 4th embodiment of the present disclosure; 
         FIG.  8    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 4th embodiment; 
         FIG.  9    is a schematic view of an imaging apparatus according to the 5th embodiment of the present disclosure; 
         FIG.  10    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 5th embodiment; 
         FIG.  11    is a schematic view of an imaging apparatus according to the 6th embodiment of the present disclosure; 
         FIG.  12    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 6th embodiment; 
         FIG.  13    is a schematic view of an imaging apparatus according to the 7th embodiment of the present disclosure; 
         FIG.  14    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 7th embodiment; 
         FIG.  15    is a schematic view of an imaging apparatus according to the 8th embodiment of the present disclosure; 
         FIG.  16    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 8th embodiment; 
         FIG.  17    is a schematic view of an imaging apparatus according to the 9th embodiment of the present disclosure; 
         FIG.  18    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 9th embodiment; 
         FIG.  19    is a schematic view of an imaging apparatus according to the 10th embodiment of the present disclosure; 
         FIG.  20    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 10th embodiment; 
         FIG.  21    is a schematic view of an imaging apparatus according to the 11th embodiment of the present disclosure; 
         FIG.  22    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 11th embodiment; 
         FIG.  23    is a schematic view of an imaging apparatus according to the 12th embodiment of the present disclosure; 
         FIG.  24    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 12th embodiment; 
         FIG.  25    is a schematic view showing inflection points of a seventh lens element of the imaging apparatus according to the 7th embodiment in  FIG.  13   ; 
         FIG.  26    is a schematic view showing critical points of the seventh lens element of the imaging apparatus according to the 7th embodiment in  FIG.  13   ; 
         FIG.  27    is a schematic view showing parameters of Yc61 and Yc62 of the imaging apparatus according to the 1st embodiment in  FIG.  1   ; 
         FIG.  28    is a three-dimensional view of an imaging apparatus according to the 13th embodiment of the present disclosure; 
         FIG.  29 A  is a schematic view showing a side of an electronic device according to the 14th embodiment of the present disclosure; 
         FIG.  29 B  is a schematic view showing another side of the electronic device in  FIG.  29 A ; 
         FIG.  29 C  is a block diagram of the electronic device in  FIG.  29 A ; 
         FIG.  30    is a schematic view of an electronic device according to the 15th embodiment of the present disclosure; and 
         FIG.  31    is a schematic view of an electronic device according to the 16th embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     A photographing lens assembly includes seven lens elements, which are, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. 
     The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. Therefore, the light converging ability of the object side of the photographing lens assembly can be provided, which is favorable for shortening the total track length thereof so as to achieve compactness. The first lens element can have an image-side surface being concave in a paraxial region thereof, which is favorable for correcting astigmatism. 
     The second lens element with negative refractive power can have an object-side surface being convex in a paraxial region thereof and has an image-side surface being concave in a paraxial region thereof. Therefore, spherical aberration and chromatic aberration generated from the first lens element can be balanced, so that the color shift can be reduced and the image sharpness can be improved. 
     The third lens element can have an image-side surface being concave in a paraxial region thereof, which is favorable for correcting aberrations of the photographing lens assembly. Moreover, at least one of an object-side surface and the image-side surface of the third lens element can include at least one inflection point, which is favorable for correcting aberrations of the off-axis field. 
     The fourth lens element can have positive refractive power. Therefore, the distribution of the positive refractive power of the photographing lens assembly can be balanced, and the photosensitivity and spherical aberration thereof can be reduced. 
     The fifth lens element can have negative refractive power, so that the principal point of the photographing lens assembly can be shifted toward the object side, which is favorable for shortening the back focal length and the total track length of the photographing lens assembly. 
     The sixth lens element can have positive refractive power and has an object-side surface being convex in a paraxial region thereof. Therefore, it is favorable for light converging with the back focal length and the total track length thereof reduced effectively. 
     The seventh lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The object-side surface of the seventh lens element can include at least one concave shape in an off-axis region thereof, and the image-side surface of the seventh lens element includes at least one convex shape in an off-axis region thereof. Therefore, the principal point of the photographing lens assembly can be shifted toward the object side, which is favorable for effectively shortening the back focal length and the total track length while correcting aberrations of the off-axis field. Furthermore, each of the object-side surface and the image-side surface of the seventh lens element can include at least two inflection points, so that the aberrations of the off-axis field can be further corrected. Moreover, each of the object-side surface and the image-side surface of the seventh lens element can include at least two critical points for correcting the off-axis aberrations. 
     When a sum of central thicknesses of the lens elements of the photographing lens assembly is ΣCT, a central thickness of the fourth lens element is CT4, a sum of axial distances between every two lens elements of the photographing lens assembly adjacent to each other is ΣAT, and an axial distance between the sixth lens element and the seventh lens element is T67, the following condition is satisfied: 2.0&lt;(ΣCT/CT4)+(ΣAT/T67)&lt;9.5. Therefore, the central thickness of the fourth lens element can be balanced with the axial distance between the sixth lens element and the seventh lens element, so that the imaging functionality in an off-axis region with a large aperture configuration and the structural strength can be improved. Moreover, the surface shapes of the sixth lens element and the seventh lens element can be properly designed, so that the aberrations in the off-axis region can be corrected and the image quality can be improved. Preferably, the following condition can be satisfied: 3.0&lt;(ΣCT/CT4)+(ΣAT/T67)&lt;9.0. More preferably, the following condition can be satisfied: 3.0&lt;(ΣCT/CT4)+(ΣAT/T67)&lt;8.5. More preferably, the following condition can be satisfied: 2.0&lt;(ΣCT/CT4)+(ΣAT/T67)&lt;7.5. More preferably, the following condition can be satisfied: 4.0&lt;(ΣCT/CT4)+(ΣAT/T67)&lt;7.0. 
     When a focal length of the photographing lens assembly is f, and a curvature radius of an object-side surface of the fourth lens element is R7, the following condition can be satisfied: 0≤f/R7. Therefore, it is favorable for the configuration of the fourth lens element to improve the structural strength of photographing lens assembly. 
     When the focal length of the photographing lens assembly is f, and a curvature radius of an image-side surface of the sixth lens element is R12, the following condition can be satisfied: 0≤f/R12. Therefore, it is favorable for shortening the back focal length of the photographing lens assembly so as to achieve compactness. 
     When a focal length of the sixth lens element is f6, and a focal length of the seventh lens element is f7, the following condition can be satisfied: −2.0&lt;f6/f7&lt;0. Therefore, an excessive difference between the refractive power of the sixth lens element and the refractive power of the seventh lens element can be avoided. Accordingly, problems, such as over correction or insufficient correction of the aberrations, can be avoided. 
     When a maximum of refractive indexes of all the lens elements of the photographing lens assembly is Nmax, the following condition can be satisfied: 1.650≤Nmax&lt;1.80. Therefore, materials of the lens elements are proper, which is favorable for the compactness of the photographing lens assembly. Accordingly, the photographing lens assembly is more applicable to compact electronic devices. Preferably, the following condition can be satisfied: 1.657≤Nmax&lt;1.75. 
     When a minimum of Abbe numbers of all the lens elements of the photographing lens assembly is Vmin, the following condition can be satisfied: 10&lt;Vmin&lt;20. Therefore, it is favorable for eliminating chromatic aberration of the photographing lens assembly, and enhancing the image quality under a large aperture configuration. 
     When an axial distance between the first lens element and the second lens element is T12, an axial distance between the second lens element and the third lens element is T23, an axial distance between the third lens element and the fourth lens element is T34, an axial distance between the fourth lens element and the fifth lens element is T45, an axial distance between the fifth lens element and the sixth lens element is T56, and the axial distance between the sixth lens element and the seventh lens element is T67, the following conditions can be satisfied: 1.0&lt;T67/T12; 1.0&lt;T67/T23; 1.0&lt;T67/T34; 1.0&lt;T67/T45; and 1.0&lt;T67/T56. Therefore, the axial distance between the sixth lens element and the seventh lens element can be increased, so that surface shapes of the sixth lens element and the seventh lens element can be properly configured to enhance the image quality in an off-axis region. Preferably, the following conditions can be satisfied: 3.0&lt;T67/T12&lt;50; 1.2&lt;T67/T23&lt;20; 2.0&lt;T67/T34&lt;20; 1.25&lt;T67/T45&lt;10; and 3.0&lt;T67/T56. More preferably, the following conditions can be satisfied: 4.0&lt;T67/T12&lt;30; 1.25&lt;T67/T23&lt;10; 3.0&lt;T67/T34&lt;10; 2.0&lt;T67/T45&lt;8.0; and 5.0&lt;T67/T56. 
     When a central thickness of the first lens element is CT1, a central thickness of the second lens element is CT2, a central thickness of the third lens element is CT3, the central thickness of the fourth lens element is CT4, a central thickness of the fifth lens element is CT5, a central thickness of the sixth lens element is CT6, and a central thickness of the seventh lens element is CT7, the following conditions can be satisfied: 1.0&lt;CT4/CT1; 1.0&lt;CT4/CT2; 1.0&lt;CT4/CT3; 1.0&lt;CT4/CT5; 1.0&lt;CT4/CT6; and 1.0&lt;CT4/CT7. Therefore, the central thickness of the fourth lens element can be increased, and the overall structure of the photographing lens assembly can be improved. Moreover, the strength of the refractive power of the fourth lens element can be enhanced, which is favorable for evenly distributing the refractive power of the photographing lens assembly. Accordingly, problems, such as surface reflection, due to the steep change of the refractive power can be avoided. Preferably, the following conditions can be satisfied: 1.0&lt;CT4/CT1&lt;2.0; 1.5&lt;CT4/CT2&lt;5.0; 1.25&lt;CT4/CT3&lt;5.0; 1.25&lt;CT4/CT5&lt;3.0; 1.0&lt;CT4/CT6&lt;3.0; and 1.2&lt;CT4/CT7&lt;3.0. More preferably, the following conditions can be satisfied: 1.0&lt;CT4/CT1&lt;1.75; 1.75&lt;CT4/CT2&lt;4.0; and 1.5&lt;CT4/CT3&lt;4.0. 
     When an f-number of the photographing lens assembly is Fno, the following condition can be satisfied: 1.0&lt;Fno&lt;1.95. Therefore, the feature of a large aperture can be enhanced while improving the photography in depth of field photos. Preferably, the following condition can be satisfied: 1.25&lt;Fno&lt;1.75. 
     When an axial distance between the object-side surface of the first lens element and an image surface is TL, and a maximum image height of the photographing lens assembly is ImgH, the following condition can be satisfied: 0.50&lt;TL/ImgH&lt;1.75. Therefore, the feature of compactness can be enhanced. Preferably, the following condition can be satisfied: 1.0&lt;TL/ImgH&lt;1.60. 
     When a focal length of the first lens element is f1, and the focal length of the sixth lens element is f6, the following condition can be satisfied: |f1|/|f6|&lt;1.0. Therefore, an excessive photosensitivity resulted from an excessive refractive power of the sixth lens element can be prevented, and the manufacturability can be enhanced. 
     When the focal length of the first lens element is f1, and the focal length of the seventh lens element is f7, the following condition can be satisfied: |f1|/|f7|&lt;1.0. Therefore, an excessive photosensitivity resulted from an excessive refractive power of the seventh lens element can be prevented, and the manufacturability can be further enhanced. 
     When the sum of the axial distances between every two lens elements of the photographing lens assembly adjacent to each other is ΣAT, and the axial distance between the sixth lens element and the seventh lens element is T67, the following condition can be satisfied: 1.0&lt;ΣAT/T67&lt;3.0. Therefore, the axial distance between the sixth lens element and the seventh lens element can be increased, so that surface shapes of the sixth lens element and the seventh lens element can be properly configured to enhance the image quality in the off-axis region. 
     When a vertical distance between a non-axial critical point on the object-side surface of the sixth lens element and an optical axis is Yc61, and a vertical distance between a non-axial critical point on the image-side surface of the sixth lens element and the optical axis is Yc62, the following condition can be satisfied: 0.5&lt;Yc61/Yc62&lt;1.5. Therefore, the correction ability for the image in the off-axis region can be further enhanced, which can improve the image quality in the off-axis region. 
     When the focal length of the photographing lens assembly is f, and a curvature radius of the object-side surface of the seventh lens element is R13, the following condition can be satisfied: 0.5&lt;f/R13. Therefore, the meniscus configuration of the seventh lens element can be improved, and the variation in lens shape and thickness from the paraxial region to the off-axis region thereof can be moderated. Accordingly, the manufacturability of the seventh lens element can be enhanced. 
     When an axial distance between the object-side surface of the first lens element and the image-side surface of the seventh lens element is TD, and an entrance pupil diameter of the photographing lens assembly is EPD, the following condition can be satisfied: 1.0&lt;TD/EPD&lt;1.95. Therefore, the total track length and the size of the aperture of the photographing lens assembly can be balanced, which is favorable for satisfying the demands of large aperture and short total track length simultaneously. 
     When the focal length of the photographing lens assembly is f, and a curvature radius of the object-side surface of the sixth lens element is R11, the following condition can be satisfied: 0≤f/R11. Therefore, the sixth lens element can be favorably configured with the meniscus shape of the seventh lens element so as to obtain a better combination in imaging quality and structure between lens elements. 
     When the axial distance between the object-side surface of the first lens element and the image-side surface of the seventh lens element is TD, and the sum of central thicknesses of the lens elements of the photographing lens assembly is ΣCT, the following condition can be satisfied: 1.0&lt;TD/ΣCT≤1.70. Therefore, the limited space can be effectively used by the photographing lens assembly so as to reduce the volume and the total track length, which is favorable for the compactness. Preferably, the following condition can be satisfied: 1.0≤Td/ΣCT≤1.60. More preferably, the following condition can be satisfied: 1.20≤Td/ΣCT≤1.50. 
     When the focal length of the photographing lens assembly is f, and a curvature radius of the image-side surface of the third lens element is R6, the following condition can be satisfied: 0≤f/R6. Therefore, the structural strength of the photographing lens assembly can be further improved. 
     Each of the aforementioned features of the photographing lens assembly can be utilized in numerous combinations, so as to achieve the corresponding functionality. 
     According to the photographing lens assembly of the present disclosure, the lens elements thereof can be made of a plastic material or a glass material. When the lens elements are made of a plastic material, the manufacturing cost can be effectively reduced. When the lens elements are made of a glass material, the arrangement of the refractive power of the photographing lens assembly may be more flexible to design. Furthermore, surfaces of each lens element can be arranged to be aspheric (ASP), since the aspheric surface of the lens element is easy to form a shape other than spherical surface so as to have more controllable variables for eliminating aberrations thereof, and to further decrease the required number of the lens elements. Therefore, the total track length of the photographing lens assembly can also be reduced. 
     According to the photographing lens assembly of the present disclosure, each of an object-side surface and an image-side surface has a paraxial region and an off-axis region. The paraxial region refers to the region of the surface where light rays travel close to the optical axis, and the off-axis region refers to the region of the surface away from the paraxial region. Particularly unless otherwise specified, when the lens element has a convex surface, it indicates that the surface can be convex in the paraxial region thereof; when the lens element has a concave surface, it indicates that the surface can be concave in the paraxial region thereof. According to the photographing lens assembly of the present disclosure, the refractive power of a lens element being positive or negative or the focal length of the lens element may refer to the refractive power or the focal length in the paraxial region of the lens element. 
     According to the photographing lens assembly of the present disclosure, the photographing lens assembly can include at least one stop, such as an aperture stop, a glare stop or a field stop. The glare stop or the field stop is for eliminating the stray light and thereby improving the image resolution thereof. 
     According to the photographing lens assembly of the present disclosure, the image surface, depending on the corresponding image sensor, can be a planar surface or a curved surface, particularly a curved surface being concave toward the object side. According to the photographing lens assembly of the present disclosure, at least one image correcting element (such as a field flattener) can be selectively disposed between a lens element closest to the image surface and the image surface so as to correct image aberrations (such as the field curvature). Properties of the image correcting element, such as curvature, thickness, refractive index, position, surface shape (convex/concave, spherical/aspheric/diffractive/Fresnel etc.) can be adjusted according to the requirements of the imaging apparatus. In general, the image correcting element is preferably a thin plano-concave element having a concave surface facing toward the object side and is disposed close to the image surface. 
     According to the photographing lens assembly of the present disclosure, an aperture stop can be configured as a front stop or a middle stop. A front stop disposed between an imaged object and the first lens element can provide a longer distance between an exit pupil of the photographing lens assembly and the image surface to enable a telecentric effect, and thereby can improve the image-sensing efficiency of an image sensor. A middle stop disposed between the first lens element and the image surface is favorable for enlarging the field of view of the photographing lens assembly and thereby provides a wider field of view for the same. 
     According to the photographing lens assembly of the present disclosure, a critical point is a non-axial point of the lens surface where its tangent is perpendicular to the optical axis. 
     According to the photographing lens assembly of the present disclosure, an inflection point is a point on a curve of a lens surface ranging from a paraxial region to an off-axis region of the lens surface where the center of curvature of the curve changes from the object side to the image side (or from the image side to the object side). 
     According to the photographing lens assembly of the present disclosure, the photographing lens assembly can be applied to 3D (three-dimensional) image capturing applications, in products such as digital cameras, mobile devices, digital tablets, smart TVs, network monitoring devices, motion sensing input devices, driving recorders, rear view camera systems, wearable devices, unmanned aerial vehicles and other electronic imaging products. 
     According to the present disclosure, an imaging apparatus is provided. The imaging apparatus includes the photographing lens assembly according to the present disclosure and an image sensor, wherein the image sensor is disposed on or near the image surface of the aforementioned photographing lens assembly. With the photographing lens assembly having seven lens elements, the imaging functionality in an off-axis region can be enhanced, which is more apparent under the configuration of large aperture. With the fourth lens element having a thicker central thickness, the structural strength of the photographing lens assembly can be improved. With the larger axial distance between the sixth lens element and the seventh lens element, the surface shapes of the sixth lens element and the seventh lens element can be properly designed, so that the aberrations in the off-axis region can be corrected and the image quality can be improved. Moreover, the back focal length can be further shortened, which is favorable for the compactness of the photographing lens assembly. Preferably, the imaging apparatus can further include a barrel member, a holder member or a combination thereof. 
     According to the present disclosure, an electronic device is provided, wherein the electronic device includes the aforementioned imaging apparatus. Therefore, it is favorable for enhancing the image quality. Preferably, the electronic device can further include, but not limited to, a control unit, a display, a storage unit, a random access memory unit (RAM) or a combination thereof. 
     According to the above description of the present disclosure, the following 1st-16th specific embodiments are provided for further explanation. 
     1st Embodiment 
       FIG.  1    is a schematic view of an imaging apparatus according to the 1st embodiment of the present disclosure.  FIG.  2    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 1st embodiment. In  FIG.  1   , the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor  195 . The photographing lens assembly includes, in order from an object side to an image side, a stop  101 , a first lens element  110 , an aperture stop  100 , a second lens element  120 , a third lens element  130 , a fourth lens element  140 , a fifth lens element  150 , a sixth lens element  160 , a seventh lens element  170 , an IR-cut filter  180  and an image surface  190 . The image sensor  195  is disposed on the image surface  190  of the photographing lens assembly. The photographing lens assembly includes seven lens elements ( 110 ,  120 ,  130 ,  140 ,  150 ,  160  and  170 ) without additional one or more lens elements inserted between the first lens element  110  and the seventh lens element  170 . 
     The first lens element  110  with positive refractive power has an object-side surface  111  being convex in a paraxial region thereof and an image-side surface  112  being concave in a paraxial region thereof. The first lens element  110  is made of a plastic material, and has the object-side surface  111  and the image-side surface  112  being both aspheric. 
     The second lens element  120  with negative refractive power has an object-side surface  121  being convex in a paraxial region thereof and an image-side surface  122  being concave in a paraxial region thereof. The second lens element  120  is made of a plastic material, and has the object-side surface  121  and the image-side surface  122  being both aspheric. 
     The third lens element  130  with positive refractive power has an object-side surface  131  being convex in a paraxial region thereof and an image-side surface  132  being concave in a paraxial region thereof. The third lens element  130  is made of a plastic material, and has the object-side surface  131  and the image-side surface  132  being both aspheric. Furthermore, each of the object-side surface  131  and the image-side surface  132  of the third lens element  130  includes at least one inflection point. 
     The fourth lens element  140  with positive refractive power has an object-side surface  141  being concave in a paraxial region thereof and an image-side surface  142  being convex in a paraxial region thereof. The fourth lens element  140  is made of a plastic material, and has the object-side surface  141  and the image-side surface  142  being both aspheric. 
     The fifth lens element  150  with positive refractive power has an object-side surface  151  being concave in a paraxial region thereof and an image-side surface  152  being convex in a paraxial region thereof. The fifth lens element  150  is made of a plastic material, and has the object-side surface  151  and the image-side surface  152  being both aspheric. 
     The sixth lens element  160  with negative refractive power has an object-side surface  161  being convex in a paraxial region thereof and an image-side surface  162  being concave in a paraxial region thereof. The sixth lens element  160  is made of a plastic material, and has the object-side surface  161  and the image-side surface  162  being both aspheric. 
     The seventh lens element  170  with negative refractive power has an object-side surface  171  being convex in a paraxial region thereof and an image-side surface  172  being concave in a paraxial region thereof. The seventh lens element  170  is made of a plastic material, and has the object-side surface  171  and the image-side surface  172  being both aspheric. Moreover, the object-side surface  171  of the seventh lens element  170  includes at least one concave shape in an off-axis region thereof, and the image-side surface  172  of the seventh lens element  170  includes at least one convex shape in an off-axis region thereof. Furthermore, each of the object-side surface  171  and the image-side surface  172  of the seventh lens element  170  includes at least two inflection points (which can refer to the inflection points IP71 and IP72 shown in  FIG.  25   ). 
     The IR-cut filter  180  is made of a glass material and located between the seventh lens element  170  and the image surface  190 , and will not affect the focal length of the photographing lens assembly. 
     The equation of the aspheric surface profiles of the aforementioned lens elements of the 1st embodiment is expressed as follows: 
     
       
         
           
             
               
                 X 
                 ⁡ 
                 ( 
                 Y 
                 ) 
               
               = 
               
                 
                   
                     ( 
                     
                       
                         Y 
                         2 
                       
                       / 
                       R 
                     
                     ) 
                   
                   / 
                   
                     ( 
                     
                       1 
                       + 
                       
                         s 
                         ⁢ 
                         q 
                         ⁢ 
                         r 
                         ⁢ 
                         
                           t 
                           ⁡ 
                           ( 
                           
                             1 
                             - 
                             
                               
                                 ( 
                                 
                                   1 
                                   + 
                                   k 
                                 
                                 ) 
                               
                               × 
                               
                                 
                                   ( 
                                   
                                     Y 
                                     / 
                                     R 
                                   
                                   ) 
                                 
                                 2 
                               
                             
                           
                           ) 
                         
                       
                     
                     ) 
                   
                 
                 + 
                 
                   
                     ∑ 
                     i 
                   
                   
                     
                       ( 
                       Ai 
                       ) 
                     
                     × 
                     
                       ( 
                       
                         Y 
                         i 
                       
                       ) 
                     
                   
                 
               
             
             , 
           
         
       
     
     where, 
     X is the relative distance between a point on the aspheric surface spaced at a distance Y from the optical axis and the tangential plane at the aspheric surface vertex on the optical axis; 
     Y is the vertical distance from the point on the aspheric surface to the optical axis; 
     R is the curvature radius; 
     k is the conic coefficient; and 
     Ai is the i-th aspheric coefficient. 
     In the photographing lens assembly according to the 1st embodiment, when a focal length of the photographing lens assembly is f, an f-number of the photographing lens assembly is Fno, and half of a maximum field of view of the photographing lens assembly is HFOV, these parameters have the following values: f=5.46 mm; Fno=1.72; and HFOV=40.0 degrees. 
     In the photographing lens assembly according to the 1st embodiment, when a refractive index of the first lens element  110  is N1, a refractive index of the second lens element  120  is N2, a refractive index of the third lens element  130  is N3, a refractive index of the fourth lens element  140  is N4, a refractive index of the fifth lens element  150  is N5, a refractive index of the sixth lens element  160  is N6, a refractive index of the seventh lens element  170  is N7, and a maximum of N1, N2, N3, N4, N5, N6 and N7 is Nmax, that is, the maximum of the refractive indexes of all the lens elements of the photographing lens assembly is Nmax (i.e., the refractive index of the sixth lens element  160  N6 in the 1st embodiment), the following condition is satisfied: Nmax=1.681. 
     In the photographing lens assembly according to the 1st embodiment, when an Abbe number of the first lens element  110  is V1, an Abbe number of the second lens element  120  is V2, an Abbe number of the third lens element  130  is V3, an Abbe number of the fourth lens element  140  is V4, an Abbe number of the fifth lens element  150  is V5, an Abbe number of the sixth lens element  160  is V6, an Abbe number of the seventh lens element  170  is V7, and a minimum of V1, V2, V3, V4, V5, V6 and V7 is Vmin, that is, the minimum of the Abbe numbers of all the lens elements of the photographing lens assembly is Vmin (i.e., the Abbe number of the sixth lens element  160  V6 in the 1st embodiment), the following condition is satisfied: Vmin=18.70. 
     In the photographing lens assembly according to the 1st embodiment, when a central thickness of the first lens element  110  is CT1, a central thickness of the second lens element  120  is CT2, a central thickness of the third lens element  130  is CT3, a central thickness of the fourth lens element  140  is CT4, a central thickness of the fifth lens element  150  is CT5, a central thickness of the sixth lens element  160  is CT6, and a central thickness of the seventh lens element  170  is CT7, the following conditions are satisfied: CT4/CT1=0.99; CT4/CT2=3.33; CT4/CT3=1.37; CT4/CT5=1.30; CT4/CT6=1.45; and CT4/CT7=2.13. 
     In the photographing lens assembly according to the 1st embodiment, when an axial distance between the first lens element  110  and the second lens element  120  is T12, an axial distance between the second lens element  120  and the third lens element  130  is T23, an axial distance between the third lens element  130  and the fourth lens element  140  is T34, an axial distance between the fourth lens element  140  and the fifth lens element  150  is T45, an axial distance between the fifth lens element  150  and the sixth lens element  160  is T56, and an axial distance between the sixth lens element  160  and the seventh lens element  170  is T67, the following conditions are satisfied: T67/T12=8.07; T67/T23=3.29; T67/T34=2.22; T67/T45=3.12; and T67/T56=18.88. 
     In the photographing lens assembly according to the 1st embodiment, when a sum of the central thicknesses of the lens elements of the photographing lens assembly is ΣCT (i.e., ΣCT=CT1+CT2+CT3+CT4+CT5+CT6+CT7), the central thickness of the fourth lens element  140  is CT4, a sum of the axial distances between every two lens elements of the photographing lens assembly adjacent to each other is ΣAT (i.e., ΣAT=T12+T23+T34+T45+T56+T67), and the axial distance between the sixth lens element  160  and the seventh lens element  170  is T67, the following conditions are satisfied: (ΣCT/CT4)+(ΣAT/T67)=7.22; and ΣAT/T67=2.25. 
     In the photographing lens assembly according to the 1st embodiment, when an axial distance between the object-side surface  111  of the first lens element  110  and the image-side surface  172  of the seventh lens element  170  is TD, the sum of the central thicknesses of the lens elements of the photographing lens assembly is ΣCT, and an entrance pupil diameter of the photographing lens assembly is EPD, the following conditions are satisfied: TD/ΣCT=1.56; and TD/EPD=1.87. 
     In the photographing lens assembly according to the 1st embodiment, when an axial distance between the object-side surface  111  of the first lens element  110  and the image surface  190  is TL, and a maximum image height of the photographing lens assembly is ImgH (half of a diagonal length of an effective photosensitive area of the image sensor  195 ), the following condition is satisfied: TL/ImgH=1.57. 
     In the photographing lens assembly according to the 1st embodiment, when the focal length of the photographing lens assembly is f, a curvature radius of the image-side surface  132  of the third lens element  130  is R6, a curvature radius of the object-side surface  141  of the fourth lens element  140  is R7, a curvature radius of the object-side surface  161  of the sixth lens element  160  is R11, a curvature radius of the image-side surface  162  of the sixth lens element  160  is R12, and a curvature radius of the object-side surface  171  of the seventh lens element  170  is R13, the following conditions are satisfied: f/R6=0.05; f/R7=−0.14; f/R11=1.06; f/R12=1.67; and f/R13=1.15. 
     In the photographing lens assembly according to the 1st embodiment, when a focal length of the first lens element  110  is f1, a focal length of the sixth lens element  160  is f6, and a focal length of the seventh lens element  170  is f7, the following conditions are satisfied: |f1|/|f6|=0.43; |f1|/|f7|=1.13; and f6/f7=2.62. 
       FIG.  27    is a schematic view showing parameters of Yc61 and Yc62 of the imaging apparatus according to the 1st embodiment in  FIG.  1   . In  FIG.  27   , when a vertical distance between a non-axial critical point on the object-side surface  161  of the sixth lens element  160  and the optical axis is Yc61, and a vertical distance between a non-axial critical point on the image-side surface  162  of the sixth lens element  160  and the optical axis is Yc62, the following condition is satisfied: Yc61/Yc62=0.79. 
     The detailed optical data of the 1st embodiment are shown in TABLE 1 and the aspheric surface data are shown in TABLE 2 below. 
     
       
         
           
               
             
               
                 TABLE 1 
               
             
            
               
                   
               
               
                 1st Embodiment 
               
               
                 f = 5.46 mm, Fno = 1.72, HFOV = 40.0 deg. 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface 
                   
                   
                   
                   
                   
                   
                 Focal 
               
               
                 # 
                   
                 Curvature Radius 
                 Thickness 
                 Material 
                 Index 
                 Abbe # 
                 Length 
               
               
                   
               
            
           
           
               
               
               
               
               
            
               
                 0 
                 Object 
                 Plano 
                 Infinity 
                   
               
               
                 1 
                 Stop 
                 Plano 
                 −0.531 
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 2 
                 Lens 1 
                 2.732 
                 ASP 
                 0.772 
                 Plastic 
                 1.545 
                 56.0 
                 6.41 
               
               
                 3 
                   
                 11.342 
                 ASP 
                 0.142 
                   
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 4 
                 Ape. Stop 
                 Plano 
                 −0.025 
                   
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 5 
                 Lens 2 
                 4.830 
                 ASP 
                 0.230 
                 Plastic 
                 1.671 
                 19.5 
                 −14.92 
               
               
                 6 
                   
                 3.196 
                 ASP 
                 0.287 
                   
                   
                   
                   
               
               
                 7 
                 Lens 3 
                 7.725 
                 ASP 
                 0.560 
                 Plastic 
                 1.544 
                 55.9 
                 15.32 
               
               
                 8 
                   
                 103.478 
                 ASP 
                 0.425 
                   
                   
                   
                   
               
               
                 9 
                 Lens 4 
                 −39.943 
                 ASP 
                 0.767 
                 Plastic 
                 1.639 
                 23.5 
                 549.10 
               
               
                 10 
                   
                 −36.127 
                 ASP 
                 0.303 
                   
                   
                   
                   
               
               
                 11 
                 Lens 5 
                 −3.759 
                 ASP 
                 0.591 
                 Plastic 
                 1.544 
                 55.9 
                 6.07 
               
               
                 12 
                   
                 −1.854 
                 ASP 
                 0.050 
                   
                   
                   
                   
               
               
                 13 
                 Lens 6 
                 5.142 
                 ASP 
                 0.529 
                 Plastic 
                 1.681 
                 18.7 
                 −14.81 
               
               
                 14 
                   
                 3.263 
                 ASP 
                 0.944 
                   
                   
                   
                   
               
               
                 15 
                 Lens 7 
                 4.735 
                 ASP 
                 0.360 
                 Plastic 
                 1.535 
                 55.8 
                 −5.65 
               
               
                 16 
                   
                 1.795 
                 ASP 
                 0.500 
                   
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 17 
                 IR-cut filter 
                 Plano 
                 0.210 
                 Glass 
                 1.517 
                 64.2 
                 — 
               
               
                 18 
                   
                 Plano 
                 0.398 
                   
                   
                   
                   
               
               
                 19 
                 Image 
                 Plano 
                 — 
                   
                   
                   
                   
               
               
                   
               
               
                 Reference wavelength is 587.6 nm (d-line). 
               
               
                 The effective radius of the surface 1 is 1.700 mm. 
               
               
                 The effective radius of the surface 6 is 1.460 mm. 
               
               
                 The effective radius of the surface 10 is 1.810 mm. 
               
               
                 The effective radius of the surface 12 is 1.950 mm. 
               
            
           
         
       
     
     
       
         
           
               
             
               
                 TABLE 2 
               
               
                   
               
               
                 Aspheric Coefficients 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface # 
                 2 
                 3 
                 5 
                 6 
                 7 
                 8 
                 9 
               
               
                   
               
               
                 k = 
                  3.0113E−02 
                 −4.6218E+01 
                 −9.0000E+01 
                 −2.5753E+01 
                 −2.1440E+01 
                 −9.0000E+01 
                  9.0000E+01 
               
               
                 A4 = 
                 −5.3978E−04 
                 −2.7070E−02 
                  1.7804E−02 
                  3.4249E−02 
                 −1.8868E−02 
                 −2.7132E−02 
                 −4.5124E−02 
               
               
                 A6 = 
                 −3.0328E−04 
                  3.1436E−02 
                 −9.2522E−02 
                 −7.1974E−02 
                  3.0101E−02 
                 −1.1859E−03 
                  4.8001E−03 
               
               
                 A8 = 
                 −1.3271E−03 
                 −2.7800E−02 
                  1.8533E−01 
                  1.0733E−01 
                 −1.0974E−01 
                 −6.5399E−03 
                 −2.1044E−03 
               
               
                 A10 = 
                  3.2016E−03 
                  1.3481E−02 
                 −2.4662E−01 
                 −1.2048E−01 
                  2.0662E−01 
                  1.0989E−02 
                 −2.8103E−02 
               
               
                 A12 = 
                 −3.8378E−03 
                 −1.6864E−03 
                  2.1688E−01 
                  8.4836E−02 
                 −2.5025E−01 
                 −1.6128E−02 
                  5.1834E−02 
               
               
                 A14 = 
                  2.4197E−03 
                 −2.1084E−03 
                 −1.2313E−01 
                 −3.1622E−02 
                  1.9019E−01 
                  1.4207E−02 
                 −4.6609E−02 
               
               
                 A16 = 
                 −8.5832E−04 
                  1.3535E−03 
                  4.3414E−02 
                  3.3500E−03 
                 −8.7200E−02 
                 −6.8672E−03 
                  2.3560E−02 
               
               
                 A18 = 
                  1.5810E−04 
                 −3.3921E−04 
                 −8.6171E−03 
                  1.4127E−03 
                  2.2153E−02 
                  1.7368E−03 
                 −6.3629E−03 
               
               
                 A20 = 
                 −1.1853E−05 
                  3.2332E−05 
                  7.3347E−04 
                 −3.5176E−04 
                 −2.3975E−03 
                 −1.8617E−04 
                  7.0883E−04 
               
               
                   
               
               
                 Surface # 
                 10 
                 11 
                 12 
                 13 
                 14 
                 15 
                 16 
               
               
                   
               
               
                 k = 
                 8.9503E+01 
                  3.3419E−01 
                 −1.2939E+00 
                 −2.7531E+00 
                 −5.9372E+00 
                 −5.0499E+01 
                 −7.6533E+00 
               
               
                 A4 = 
                 −3.9298E−02  
                 −2.1363E−02 
                  1.2635E−02 
                 −1.8667E−02 
                 −2.9216E−02 
                 −1.2663E−01 
                 −6.9496E−02 
               
               
                 A6 = 
                 2.6270E−03 
                  2.1403E−02 
                 −8.6140E−03 
                 −1.0177E−02 
                  7.6262E−03 
                  5.1234E−02 
                  2.6276E−02 
               
               
                 A8 = 
                 2.0546E−02 
                  1.3604E−02 
                  1.1879E−02 
                  5.5276E−03 
                 −5.6132E−03 
                 −1.9332E−02 
                 −8.4222E−03 
               
               
                 A10 = 
                 −3.5301E−02  
                 −2.6587E−02 
                 −7.8164E−03 
                 −3.9003E−03 
                  2.5021E−03 
                  5.6231E−03 
                  1.9162E−03 
               
               
                 A12 = 
                 2.5774E−02 
                  1.2459E−02 
                  1.4145E−03 
                  1.8581E−03 
                 −6.5088E−04 
                 −1.0469E−03 
                 −2.8868E−04 
               
               
                 A14 = 
                 −1.0734E−02  
                 −1.2561E−03 
                  7.2744E−04 
                 −4.9793E−04 
                  1.0372E−04 
                  1.2048E−04 
                  2.7936E−05 
               
               
                 A16 = 
                 2.7341E−03 
                 −6.6568E−04 
                 −3.8422E−04 
                  6.7088E−05 
                 −1.0058E−05 
                 −8.3461E−06 
                 −1.6592E−06 
               
               
                 A18 = 
                 −4.1042E−04  
                  2.0609E−04 
                  6.5205E−05 
                 −3.6095E−06 
                  5.5114E−07 
                  3.2037E−07 
                  5.4511E−08 
               
               
                 A20 = 
                 2.8360E−05 
                 −1.7139E−05 
                 −3.8425E−06 
                  2.2197E−08 
                 −1.3235E−08 
                 −5.2525E−09 
                 −7.4822E−10 
               
               
                   
               
            
           
         
       
     
     In TABLE 1, the curvature radius, the thickness and the focal length are shown in millimeters (mm). Surface numbers 0-19 represent the surfaces sequentially arranged from the object-side to the image-side along the optical axis. In TABLE 2, k represents the conic coefficient of the equation of the aspheric surface profiles. A4-A20 represent the aspheric coefficients ranging from the 4th order to the 20th order. The tables presented below for each embodiment are the corresponding schematic parameter and aberration curves, and the definitions of the tables are the same as TABLE 1 and TABLE 2 of the 1st embodiment. Therefore, an explanation in this regard will not be provided again. 
     2nd Embodiment 
       FIG.  3    is a schematic view of an imaging apparatus according to the 2nd embodiment of the present disclosure.  FIG.  4    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 2nd embodiment. In  FIG.  3   , the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor  295 . The photographing lens assembly includes, in order from an object side to an image side, an aperture stop  200 , a first lens element  210 , a second lens element  220 , a stop  201 , a third lens element  230 , a fourth lens element  240 , a fifth lens element  250 , a sixth lens element  260 , a seventh lens element  270 , an IR-cut filter  280  and an image surface  290 . The image sensor  295  is disposed on the image surface  290  of the photographing lens assembly. The photographing lens assembly includes seven lens elements ( 210 ,  220 ,  230 ,  240 ,  250 ,  260  and  270 ) without additional one or more lens elements inserted between the first lens element  210  and the seventh lens element  270 . 
     The first lens element  210  with positive refractive power has an object-side surface  211  being convex in a paraxial region thereof and an image-side surface  212  being concave in a paraxial region thereof. The first lens element  210  is made of a plastic material, and has the object-side surface  211  and the image-side surface  212  being both aspheric. 
     The second lens element  220  with negative refractive power has an object-side surface  221  being convex in a paraxial region thereof and an image-side surface  222  being concave in a paraxial region thereof. The second lens element  220  is made of a plastic material, and has the object-side surface  221  and the image-side surface  222  being both aspheric. 
     The third lens element  230  with negative refractive power has an object-side surface  231  being convex in a paraxial region thereof and an image-side surface  232  being concave in a paraxial region thereof. The third lens element  230  is made of a plastic material, and has the object-side surface  231  and the image-side surface  232  being both aspheric. Furthermore, each of the object-side surface  231  and the image-side surface  232  of the third lens element  230  includes at least one inflection point. 
     The fourth lens element  240  with positive refractive power has an object-side surface  241  being convex in a paraxial region thereof and an image-side surface  242  being convex in a paraxial region thereof. The fourth lens element  240  is made of a plastic material, and has the object-side surface  241  and the image-side surface  242  being both aspheric. 
     The fifth lens element  250  with negative refractive power has an object-side surface  251  being concave in a paraxial region thereof and an image-side surface  252  being convex in a paraxial region thereof. The fifth lens element  250  is made of a plastic material, and has the object-side surface  251  and the image-side surface  252  being both aspheric. 
     The sixth lens element  260  with positive refractive power has an object-side surface  261  being convex in a paraxial region thereof and an image-side surface  262  being concave in a paraxial region thereof. The sixth lens element  260  is made of a plastic material, and has the object-side surface  261  and the image-side surface  262  being both aspheric. 
     The seventh lens element  270  with negative refractive power has an object-side surface  271  being convex in a paraxial region thereof and an image-side surface  272  being concave in a paraxial region thereof. The seventh lens element  270  is made of a plastic material, and has the object-side surface  271  and the image-side surface  272  being both aspheric. Moreover, the object-side surface  271  of the seventh lens element  270  includes at least one concave shape in an off-axis region thereof, and the image-side surface  272  of the seventh lens element  270  includes at least one convex shape in an off-axis region thereof. Furthermore, each of the object-side surface  271  and the image-side surface  272  of the seventh lens element  270  includes at least two inflection points. 
     The IR-cut filter  280  is made of a glass material and located between the seventh lens element  270  and the image surface  290 , and will not affect the focal length of the photographing lens assembly. 
     The detailed optical data of the 2nd embodiment are shown in TABLE 3 and the aspheric surface data are shown in TABLE 4 below. 
     
       
         
           
               
             
               
                 TABLE 3 
               
             
            
               
                   
               
               
                 2nd Embodiment 
               
               
                 f = 5.32 mm, Fno = 1.70, HFOV = 38.0 deg. 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface 
                   
                   
                   
                   
                   
                   
                 Focal 
               
               
                 # 
                   
                 Curvature Radius 
                 Thickness 
                 Material 
                 Index 
                 Abbe # 
                 Length 
               
               
                   
               
            
           
           
               
               
               
               
               
            
               
                 0 
                 Object 
                 Plano 
                 Infinity 
                   
               
               
                 1 
                 Ape. Stop 
                 Plano 
                 −0.455 
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 2 
                 Lens 1 
                 2.640 
                 ASP 
                 0.735 
                 Plastic 
                 1.545 
                 56.1 
                 5.57 
               
               
                 3 
                   
                 18.204 
                 ASP 
                 0.030 
                   
                   
                   
                   
               
               
                 4 
                 Lens 2 
                 3.260 
                 ASP 
                 0.300 
                 Plastic 
                 1.669 
                 19.5 
                 −13.31 
               
               
                 5 
                   
                 2.298 
                 ASP 
                 0.436 
                   
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 6 
                 Stop 
                 Plano 
                 0.181 
                   
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 7 
                 Lens 3 
                 8.275 
                 ASP 
                 0.325 
                 Plastic 
                 1.669 
                 19.5 
                 −19.02 
               
               
                 8 
                   
                 4.935 
                 ASP 
                 0.109 
                   
                   
                   
                   
               
               
                 9 
                 Lens 4 
                 7.200 
                 ASP 
                 0.664 
                 Plastic 
                 1.544 
                 56.0 
                 11.07 
               
               
                 10 
                   
                 −35.686 
                 ASP 
                 0.502 
                   
                   
                   
                   
               
               
                 11 
                 Lens 5 
                 −6.314 
                 ASP 
                 0.431 
                 Plastic 
                 1.566 
                 37.4 
                 −18.03 
               
               
                 12 
                   
                 −16.970 
                 ASP 
                 0.031 
                   
                   
                   
                   
               
               
                 13 
                 Lens 6 
                 1.573 
                 ASP 
                 0.415 
                 Plastic 
                 1.544 
                 56.0 
                 6.48 
               
               
                 14 
                   
                 2.578 
                 ASP 
                 0.794 
                   
                   
                   
                   
               
               
                 15 
                 Lens 7 
                 2.366 
                 ASP 
                 0.435 
                 Plastic 
                 1.534 
                 55.9 
                 −7.43 
               
               
                 16 
                   
                 1.387 
                 ASP 
                 0.700 
                   
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 17 
                 IR-cut filter 
                 Plano 
                 0.150 
                 Glass 
                 1.517 
                 64.2 
                 — 
               
               
                 18 
                   
                 Plano 
                 0.405 
                   
                   
                   
                   
               
               
                 19 
                 Image 
                 Plano 
                 — 
                   
                   
                   
                   
               
               
                   
               
               
                 Reference wavelength is 587.6 nm (d-line). 
               
               
                 The effective radius of the surface 6 is 1.380 mm. 
               
            
           
         
       
     
     
       
         
           
               
             
               
                 TABLE 4 
               
               
                   
               
               
                 Aspheric Coefficients 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface # 
                 2 
                 3 
                 4 
                 5 
                 7 
                 8 
                 9 
               
               
                   
               
               
                 k = 
                  9.9255E−02 
                  8.6792E+01 
                 −1.6329E+01 
                 −3.4656E+00 
                 −8.8800E+01 
                 −1.3982E+01 
                 −9.0000E+01 
               
               
                 A4 = 
                 −1.3108E−03 
                 −9.3343E−03 
                  2.7727E−02 
                  7.2364E−03 
                 −1.1839E−02 
                 −1.4976E−02 
                  2.2148E−02 
               
               
                 A6 = 
                 −2.7609E−04 
                 −7.6631E−03 
                 −3.8543E−02 
                 −9.7762E−03 
                 −1.9481E−02 
                 −3.4361E−02 
                 −5.9104E−02 
               
               
                 A8 = 
                 −6.2768E−04 
                  1.3987E−02 
                  3.4984E−02 
                  9.6887E−03 
                  1.1607E−02 
                  3.3190E−02 
                  4.6080E−02 
               
               
                 A10 = 
                 −3.9745E−04 
                 −9.4234E−03 
                 −1.6109E−02 
                 −2.7215E−03 
                 −9.5789E−03 
                 −1.9239E−02 
                 −1.7285E−02 
               
               
                 A12 = 
                  3.3846E−04 
                  2.8278E−03 
                  3.7863E−03 
                 −2.2295E−04 
                  3.1233E−03 
                  5.6472E−03 
                  3.3176E−03 
               
               
                 A14 = 
                 −9.3445E−05 
                 −3.4969E−04 
                 −3.3899E−04 
                  1.6251E−04 
                 −2.6327E−04 
                 −5.9785E−04 
                 −2.5978E−04 
               
               
                   
               
               
                 Surface # 
                 10 
                 11 
                 12 
                 13 
                 14 
                 15 
                 16 
               
               
                   
               
               
                 k = 
                 −9.0000E+01 
                 −6.8173E−01 
                 1.8122E+01 
                 −5.2330E+00 
                 −7.6024E−01 
                 −9.2899E+00 
                 −4.8562E+00 
               
               
                 A4 = 
                 −6.2317E−04 
                  9.9474E−02 
                 −6.4510E−02  
                  3.3669E−02 
                  5.1520E−02 
                 −1.5229E−01 
                 −9.8297E−02 
               
               
                 A6 = 
                 −1.5478E−02 
                 −8.6421E−02 
                 4.9816E−02 
                 −2.7085E−02 
                 −5.7553E−02 
                  5.1288E−02 
                  3.3152E−02 
               
               
                 A8 = 
                 −4.0248E−03 
                  5.7459E−02 
                 −2.1093E−02  
                  8.9926E−04 
                  1.8283E−02 
                 −1.0724E−02 
                 −8.0250E−03 
               
               
                 A10 = 
                  7.5235E−03 
                 −3.1899E−02 
                 2.5766E−03 
                  1.3720E−03 
                 −3.3439E−03 
                  1.5231E−03 
                  1.2379E−03 
               
               
                 A12 = 
                 −2.5529E−03 
                  1.0779E−02 
                 5.3892E−04 
                 −3.8526E−04 
                  3.6378E−04 
                 −1.3635E−04 
                 −1.1339E−04 
               
               
                 A14 = 
                  2.7637E−04 
                 −1.9069E−03 
                 −1.5571E−04  
                  4.8768E−05 
                 −2.1481E−05 
                  6.8116E−06 
                  5.6202E−06 
               
               
                 A16 = 
                   
                  1.3437E−04 
                 1.0165E−05 
                 −2.3823E−06 
                  5.2214E−07 
                 −1.4396E−07 
                 −1.1575E−07 
               
               
                   
               
            
           
         
       
     
     In the 2nd embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in the following table are the same as those stated in the 1st embodiment with corresponding values for the 2nd embodiment, so an explanation in this regard will not be provided again. 
     Moreover, these parameters can be calculated from TABLE 3 and TABLE 4 as the following values and satisfy the following conditions: 
     
       
         
           
               
             
               
                   
               
               
                 2nd Embodiment 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 f (mm) 
                 5.32 
                 T67/T56 
                 25.61 
               
               
                   
                 Fno 
                 1.70 
                 (ΣCT/CT4) + (ΣAT/T67) 
                 7.60 
               
               
                   
                 HFOV (deg.) 
                 38.0 
                 ΣAT/T67 
                 2.62 
               
               
                   
                 Nmax 
                 1.669 
                 TD/ΣCT 
                 1.63 
               
               
                   
                 Vmin 
                 19.45 
                 TD/EPD 
                 1.72 
               
               
                   
                 CT4/CT1 
                 0.90 
                 TL/lmgH 
                 1.57 
               
               
                   
                 CT4/CT2 
                 2.21 
                 f/R6 
                 1.08 
               
               
                   
                 CT4/CT3 
                 2.04 
                 f/R7 
                 0.74 
               
               
                   
                 CT4/CT5 
                 1.54 
                 f/R11 
                 3.38 
               
               
                   
                 CT4/CT6 
                 1.60 
                 f/R12 
                 2.06 
               
               
                   
                 CT4/CT7 
                 1.53 
                 f/R13 
                 2.25 
               
               
                   
                 T67/T12 
                 26.47 
                 |f1|/|f6| 
                 0.86 
               
               
                   
                 T67/T23 
                 1.29 
                 |f1|/|f7| 
                 0.75 
               
               
                   
                 T67/T34 
                 7.28 
                 f6/f7 
                 −0.87 
               
               
                   
                 T67/T45 
                 1.58 
                 Yc61/Yc62 
                 0.85 
               
               
                   
                   
               
            
           
         
       
     
     3rd Embodiment 
       FIG.  5    is a schematic view of an imaging apparatus according to the 3rd embodiment of the present disclosure.  FIG.  6    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 3rd embodiment. In  FIG.  5   , the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor  395 . The photographing lens assembly includes, in order from an object side to an image side, an aperture stop  300 , a first lens element  310 , a second lens element  320 , a stop  301 , a third lens element  330 , a fourth lens element  340 , a fifth lens element  350 , a sixth lens element  360 , a seventh lens element  370 , an IR-cut filter  380  and an image surface  390 . The image sensor  395  is disposed on the image surface  390  of the photographing lens assembly. The photographing lens assembly includes seven lens elements ( 310 ,  320 ,  330 ,  340 ,  350 ,  360  and  370 ) without additional one or more lens elements inserted between the first lens element  310  and the seventh lens element  370 . 
     The first lens element  310  with positive refractive power has an object-side surface  311  being convex in a paraxial region thereof and an image-side surface  312  being concave in a paraxial region thereof. The first lens element  310  is made of a plastic material, and has the object-side surface  311  and the image-side surface  312  being both aspheric. 
     The second lens element  320  with negative refractive power has an object-side surface  321  being convex in a paraxial region thereof and an image-side surface  322  being concave in a paraxial region thereof. The second lens element  320  is made of a plastic material, and has the object-side surface  321  and the image-side surface  322  being both aspheric. 
     The third lens element  330  with negative refractive power has an object-side surface  331  being convex in a paraxial region thereof and an image-side surface  332  being concave in a paraxial region thereof. The third lens element  330  is made of a plastic material, and has the object-side surface  331  and the image-side surface  332  being both aspheric. Furthermore, each of the object-side surface  331  and the image-side surface  332  of the third lens element  330  includes at least one inflection point. 
     The fourth lens element  340  with positive refractive power has an object-side surface  341  being convex in a paraxial region thereof and an image-side surface  342  being concave in a paraxial region thereof. The fourth lens element  340  is made of a plastic material, and has the object-side surface  341  and the image-side surface  342  being both aspheric. 
     The fifth lens element  350  with negative refractive power has an object-side surface  351  being concave in a paraxial region thereof and an image-side surface  352  being convex in a paraxial region thereof. The fifth lens element  350  is made of a plastic material, and has the object-side surface  351  and the image-side surface  352  being both aspheric. 
     The sixth lens element  360  with positive refractive power has an object-side surface  361  being convex in a paraxial region thereof and an image-side surface  362  being concave in a paraxial region thereof. The sixth lens element  360  is made of a plastic material, and has the object-side surface  361  and the image-side surface  362  being both aspheric. 
     The seventh lens element  370  with negative refractive power has an object-side surface  371  being convex in a paraxial region thereof and an image-side surface  372  being concave in a paraxial region thereof. The seventh lens element  370  is made of a plastic material, and has the object-side surface  371  and the image-side surface  372  being both aspheric. Moreover, the object-side surface  371  of the seventh lens element  370  includes at least one concave shape in an off-axis region thereof, and the image-side surface  372  of the seventh lens element  370  includes at least one convex shape in an off-axis region thereof. Furthermore, each of the object-side surface  371  and the image-side surface  372  of the seventh lens element  370  includes at least two inflection points. 
     The IR-cut filter  380  is made of a glass material and located between the seventh lens element  370  and the image surface  390 , and will not affect the focal length of the photographing lens assembly. 
     The detailed optical data of the 3rd embodiment are shown in TABLE 5 and the aspheric surface data are shown in TABLE 6 below. 
     
       
         
           
               
             
               
                 TABLE 5 
               
             
            
               
                   
               
               
                 3rd Embodiment 
               
               
                 f = 5.31 mm, Fno = 1.70, HFOV = 38.0 deg. 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface 
                   
                   
                   
                   
                   
                   
                 Focal 
               
               
                 # 
                   
                 Curvature Radius 
                 Thickness 
                 Material 
                 Index 
                 Abbe # 
                 Length 
               
               
                   
               
            
           
           
               
               
               
               
               
            
               
                 0 
                 Object 
                 Plano 
                 Infinity 
                   
               
               
                 1 
                 Ape. Stop 
                 Plano 
                 −0.459 
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 2 
                 Lens 1 
                 2.599 
                 ASP 
                 0.754 
                 Plastic 
                 1.545 
                 56.1 
                 5.50 
               
               
                 3 
                   
                 17.569 
                 ASP 
                 0.030 
                   
                   
                   
                   
               
               
                 4 
                 Lens 2 
                 3.356 
                 ASP 
                 0.300 
                 Plastic 
                 1.669 
                 19.5 
                 −12.78 
               
               
                 5 
                   
                 2.323 
                 ASP 
                 0.437 
                   
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 6 
                 Stop 
                 Plano 
                 0.179 
                   
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 7 
                 Lens 3 
                 8.629 
                 ASP 
                 0.325 
                 Plastic 
                 1.669 
                 19.5 
                 −17.23 
               
               
                 8 
                   
                 4.860 
                 ASP 
                 0.097 
                   
                   
                   
                   
               
               
                 9 
                 Lens 4 
                 5.722 
                 ASP 
                 0.618 
                 Plastic 
                 1.544 
                 56.0 
                 11.34 
               
               
                 10 
                   
                 75.612 
                 ASP 
                 0.513 
                   
                   
                   
                   
               
               
                 11 
                 Lens 5 
                 −6.594 
                 ASP 
                 0.449 
                 Plastic 
                 1.566 
                 37.4 
                 −21.47 
               
               
                 12 
                   
                 −14.769 
                 ASP 
                 0.030 
                   
                   
                   
                   
               
               
                 13 
                 Lens 6 
                 1.627 
                 ASP 
                 0.415 
                 Plastic 
                 1.544 
                 56.0 
                 6.81 
               
               
                 14 
                   
                 2.640 
                 ASP 
                 0.773 
                   
                   
                   
                   
               
               
                 15 
                 Lens 7 
                 2.050 
                 ASP 
                 0.435 
                 Plastic 
                 1.534 
                 55.9 
                 −8.32 
               
               
                 16 
                   
                 1.299 
                 ASP 
                 0.700 
                   
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 17 
                 IR-cut filter 
                 Plano 
                 0.150 
                 Glass 
                 1.517 
                 64.2 
                 — 
               
               
                 18 
                   
                 Plano 
                 0.437 
                   
                   
                   
                   
               
               
                 19 
                 Image 
                 Plano 
                 — 
                   
                   
                   
                   
               
               
                   
               
               
                 Reference wavelength is 587.6 nm (d-line). 
               
               
                 The effective radius of the surface 6 is 1.380 mm. 
               
            
           
         
       
     
     
       
         
           
               
             
               
                 TABLE 6 
               
               
                   
               
               
                 Aspheric Coefficients 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface # 
                 2 
                 3 
                 4 
                 5 
                 7 
                 8 
                 9 
               
               
                   
               
               
                 k = 
                  2.8885E−02 
                  8.9377E+01 
                 −1.6054E+01 
                 −3.2905E+00  
                 −6.9212E+01 
                 −1.1539E+01 
                 −9.0000E+01 
               
               
                 A4 = 
                 −2.1511E−03 
                 −1.8868E−03 
                  3.3565E−02 
                 8.7825E−03 
                 −8.1575E−03 
                 −9.9060E−03 
                  4.1914E−02 
               
               
                 A6 = 
                  2.3216E−03 
                 −1.9353E−02 
                 −4.6869E−02 
                 −6.2292E−03  
                 −1.9567E−02 
                 −4.6041E−02 
                 −9.4790E−02 
               
               
                 A8 = 
                 −3.1760E−03 
                  2.2047E−02 
                  3.9710E−02 
                 9.3386E−04 
                  1.3587E−02 
                  4.7879E−02 
                  7.3701E−02 
               
               
                 A10 = 
                  9.8102E−04 
                 −1.2689E−02 
                 −1.7283E−02 
                 5.3516E−03 
                 −1.0579E−02 
                 −2.7427E−02 
                 −2.9076E−02 
               
               
                 A12 = 
                 −6.1940E−05 
                  3.5008E−03 
                  3.8158E−03 
                 −3.5454E−03  
                  3.1533E−03 
                  7.7164E−03 
                  5.9251E−03 
               
               
                 A14 = 
                 −5.0465E−05 
                 −4.0541E−04 
                 −3.0643E−04 
                 7.0031E−04 
                 −2.3799E−04 
                 −7.9657E−04 
                 −4.9173E−04 
               
               
                   
               
               
                 Surface # 
                 10 
                 11 
                 12 
                 13 
                 14 
                 15 
                 16 
               
               
                   
               
               
                 k = 
                 −4.4537E+01 
                 −2.6716E+00 
                 −3.2689E+01 
                 −4.9675E+00 
                 −9.4470E−01 
                 −6.2854E+00 
                 −4.2759E+00 
               
               
                 A4 = 
                 −2.9770E−03 
                  7.5467E−02 
                 −7.6480E−02 
                  3.9481E−02 
                  6.7864E−02 
                 −1.6024E−01 
                 −1.0493E−01 
               
               
                 A6 = 
                 −1.2035E−02 
                 −5.4801E−02 
                  5.6026E−02 
                 −3.1589E−02 
                 −6.7762E−02 
                  5.5384E−02 
                  3.6081E−02 
               
               
                 A8 = 
                 −8.7427E−03 
                  3.4842E−02 
                 −2.1140E−02 
                  2.8437E−03 
                  2.2066E−02 
                 −1.1680E−02 
                 −8.7661E−03 
               
               
                 A10 = 
                  9.9197E−03 
                 −2.1724E−02 
                  1.5321E−03 
                  8.0368E−04 
                 −4.1799E−03 
                  1.5807E−03 
                  1.3478E−03 
               
               
                 A12 = 
                 −3.1288E−03 
                  7.9718E−03 
                  9.8123E−04 
                 −2.5928E−04 
                  4.7190E−04 
                 −1.2983E−04 
                 −1.2243E−04 
               
               
                 A14 = 
                  3.2986E−04 
                 −1.4695E−03 
                 −2.3292E−04 
                  3.1976E−05 
                 −2.9314E−05 
                  5.8742E−06 
                  5.9771E−06 
               
               
                 A16 = 
                   
                  1.0495E−04 
                  1.5080E−05 
                 −1.4819E−06 
                  7.7330E−07 
                 −1.1247E−07 
                 −1.2028E−07 
               
               
                   
               
            
           
         
       
     
     In the 3rd embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in the following table are the same as those stated in the 1st embodiment with corresponding values for the 3rd embodiment, so an explanation in this regard will not be provided again. 
     Moreover, these parameters can be calculated from TABLE 5 and TABLE 6 as the following values and satisfy the following conditions: 
     
       
         
           
               
             
               
                   
               
               
                 3rd Embodiment 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 f (mm) 
                 5.31 
                 T67/T56 
                 25.77 
               
               
                   
                 Fno 
                 1.70 
                 (ΣCT/CT4) + (ΣAT/T67) 
                 8.00 
               
               
                   
                 HFOV (deg.) 
                 38.0 
                 ΣAT/T67 
                 2.66 
               
               
                   
                 Nmax 
                 1.669 
                 TD/ΣCT 
                 1.62 
               
               
                   
                 Vmin 
                 19.45 
                 TD/EPD 
                 1.71 
               
               
                   
                 CT4/CT1 
                 0.82 
                 TL/lmgH 
                 1.57 
               
               
                   
                 CT4/CT2 
                 2.06 
                 f/R6 
                 1.09 
               
               
                   
                 CT4/CT3 
                 1.90 
                 f/R7 
                 0.93 
               
               
                   
                 CT4/CT5 
                 1.38 
                 f/R11 
                 3.26 
               
               
                   
                 CT4/CT6 
                 1.49 
                 f/R12 
                 2.01 
               
               
                   
                 CT4/CT7 
                 1.42 
                 f/R13 
                 2.59 
               
               
                   
                 T67/T12 
                 25.77 
                 |f1|/|f6| 
                 0.81 
               
               
                   
                 T67/T23 
                 1.25 
                 |f1|/|f7| 
                 0.66 
               
               
                   
                 T67/T34 
                 7.97 
                 f6/f7 
                 −0.82 
               
               
                   
                 T67/T45 
                 1.51 
                 Yc61/Yc62 
                 0.86 
               
               
                   
                   
               
            
           
         
       
     
     4th Embodiment 
       FIG.  7    is a schematic view of an imaging apparatus according to the 4th embodiment of the present disclosure.  FIG.  8    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 4th embodiment. In  FIG.  7   , the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor  495 . The photographing lens assembly includes, in order from an object side to an image side, an aperture stop  400 , a first lens element  410 , a second lens element  420 , a third lens element  430 , a stop  401 , a fourth lens element  440 , a fifth lens element  450 , a sixth lens element  460 , a seventh lens element  470 , an IR-cut filter  480  and an image surface  490 . The image sensor  495  is disposed on the image surface  490  of the photographing lens assembly. The photographing lens assembly includes seven lens elements ( 410 ,  420 ,  430 ,  440 ,  450 ,  460  and  470 ) without additional one or more lens elements inserted between the first lens element  410  and the seventh lens element  470 . 
     The first lens element  410  with positive refractive power has an object-side surface  411  being convex in a paraxial region thereof and an image-side surface  412  being concave in a paraxial region thereof. The first lens element  410  is made of a plastic material, and has the object-side surface  411  and the image-side surface  412  being both aspheric. 
     The second lens element  420  with negative refractive power has an object-side surface  421  being convex in a paraxial region thereof and an image-side surface  422  being concave in a paraxial region thereof. The second lens element  420  is made of a plastic material, and has the object-side surface  421  and the image-side surface  422  being both aspheric. 
     The third lens element  430  with negative refractive power has an object-side surface  431  being convex in a paraxial region thereof and an image-side surface  432  being concave in a paraxial region thereof. The third lens element  430  is made of a plastic material, and has the object-side surface  431  and the image-side surface  432  being both aspheric. Furthermore, each of the object-side surface  431  and the image-side surface  432  of the third lens element  430  includes at least one inflection point. 
     The fourth lens element  440  with positive refractive power has an object-side surface  441  being convex in a paraxial region thereof and an image-side surface  442  being convex in a paraxial region thereof. The fourth lens element  440  is made of a plastic material, and has the object-side surface  441  and the image-side surface  442  being both aspheric. 
     The fifth lens element  450  with negative refractive power has an object-side surface  451  being concave in a paraxial region thereof and an image-side surface  452  being convex in a paraxial region thereof. The fifth lens element  450  is made of a plastic material, and has the object-side surface  451  and the image-side surface  452  being both aspheric. 
     The sixth lens element  460  with positive refractive power has an object-side surface  461  being convex in a paraxial region thereof and an image-side surface  462  being concave in a paraxial region thereof. The sixth lens element  460  is made of a plastic material, and has the object-side surface  461  and the image-side surface  462  being both aspheric. 
     The seventh lens element  470  with negative refractive power has an object-side surface  471  being convex in a paraxial region thereof and an image-side surface  472  being concave in a paraxial region thereof. The seventh lens element  470  is made of a plastic material, and has the object-side surface  471  and the image-side surface  472  being both aspheric. Moreover, the object-side surface  471  of the seventh lens element  470  includes at least one concave shape in an off-axis region thereof, and the image-side surface  472  of the seventh lens element  470  includes at least one convex shape in an off-axis region thereof. Furthermore, each of the object-side surface  471  and the image-side surface  472  of the seventh lens element  470  includes at least two inflection points. 
     The IR-cut filter  480  is made of a glass material and located between the seventh lens element  470  and the image surface  490 , and will not affect the focal length of the photographing lens assembly. 
     The detailed optical data of the 4th embodiment are shown in TABLE 7 and the aspheric surface data are shown in TABLE 8 below. 
     
       
         
           
               
             
               
                 TABLE 7 
               
             
            
               
                   
               
               
                 4th Embodiment 
               
               
                 f = 3.99 mm, Fno = 1.70, HFOV = 38.3 deg. 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface 
                   
                   
                   
                   
                   
                   
                 Focal 
               
               
                 # 
                   
                 Curvature Radius 
                 Thickness 
                 Material 
                 Index 
                 Abbe # 
                 Length 
               
               
                   
               
            
           
           
               
               
               
               
               
            
               
                 0 
                 Object 
                 Plano 
                 Infinity 
                   
               
               
                 1 
                 Ape. Stop 
                 Plano 
                 −0.416 
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 2 
                 Lens 1 
                 1.786 
                 ASP 
                 0.631 
                 Plastic 
                 1.545 
                 56.0 
                 3.49 
               
               
                 3 
                   
                 26.276 
                 ASP 
                 0.050 
                   
                   
                   
                   
               
               
                 4 
                 Lens 2 
                 10.814 
                 ASP 
                 0.240 
                 Plastic 
                 1.639 
                 23.5 
                 −7.78 
               
               
                 5 
                   
                 3.375 
                 ASP 
                 0.296 
                   
                   
                   
                   
               
               
                 6 
                 Lens 3 
                 4.334 
                 ASP 
                 0.260 
                 Plastic 
                 1.660 
                 20.4 
                 −20.54 
               
               
                 7 
                   
                 3.206 
                 ASP 
                 0.054 
                   
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 8 
                 Stop 
                 Plano 
                 0.044 
                   
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 9 
                 Lens 4 
                 8.485 
                 ASP 
                 0.566 
                 Plastic 
                 1.544 
                 56.0 
                 4.69 
               
               
                 10 
                   
                 −3.564 
                 ASP 
                 0.229 
                   
                   
                   
                   
               
               
                 11 
                 Lens 5 
                 −1.135 
                 ASP 
                 0.320 
                 Plastic 
                 1.576 
                 30.8 
                 −6.31 
               
               
                 12 
                   
                 −1.820 
                 ASP 
                 0.035 
                   
                   
                   
                   
               
               
                 13 
                 Lens 6 
                 1.800 
                 ASP 
                 0.485 
                 Plastic 
                 1.569 
                 39.3 
                 4.54 
               
               
                 14 
                   
                 5.355 
                 ASP 
                 0.425 
                   
                   
                   
                   
               
               
                 15 
                 Lens 7 
                 122.166 
                 ASP 
                 0.340 
                 Plastic 
                 1.530 
                 46.7 
                 −3.78 
               
               
                 16 
                   
                 1.972 
                 ASP 
                 0.500 
                   
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 17 
                 IR-cut filter 
                 Plano 
                 0.210 
                 Glass 
                 1.517 
                 64.2 
                 — 
               
               
                 18 
                   
                 Plano 
                 0.307 
                   
                   
                   
                   
               
               
                 19 
                 Image 
                 Plano 
                 — 
                   
                   
                   
                   
               
               
                   
               
               
                 Reference wavelength is 587.6 nm (d-line). 
               
               
                 The effective radius of the surface 8 is 1.150 mm. 
               
            
           
         
       
     
     
       
         
           
               
             
               
                 TABLE 8 
               
               
                   
               
               
                 Aspheric Coefficients 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface # 
                 2 
                 3 
                 4 
                 5 
                 6 
                 7 
                 9 
               
               
                   
               
               
                 k = 
                 −2.6591E−01 
                 −9.0000E+01 
                 −6.4466E+01 
                 −6.6090E+00 
                 −5.5971E+01 
                 −1.8386E+01 
                 2.8625E+01 
               
               
                 A4 = 
                  2.9567E−03 
                 −5.2167E−02 
                 −8.9699E−02 
                 −6.4482E−02 
                 −8.1028E−02 
                 −1.3381E−01 
                 −1.3417E−01  
               
               
                 A6 = 
                  8.8745E−03 
                  1.1380E−01 
                  1.8913E−01 
                  1.2435E−01 
                  1.0467E−03 
                  2.1960E−01 
                 1.9118E−01 
               
               
                 A8 = 
                 −1.6682E−02 
                 −1.2717E−01 
                 −2.2322E−01 
                 −2.1096E−01 
                 −1.4697E−01 
                 −6.3599E−01 
                 −5.0695E−01  
               
               
                 A10 = 
                  1.7846E−02 
                  6.4349E−02 
                  1.3138E−01 
                  1.5943E−01 
                  1.1643E−01 
                  9.0131E−01 
                 8.1802E−01 
               
               
                 A12 = 
                 −8.5366E−03 
                 −1.2560E−02 
                 −2.6985E−02 
                 −5.0198E−02 
                 −2.8405E−02 
                 −5.9417E−01 
                 −5.7692E−01  
               
               
                 A14 = 
                   
                   
                   
                   
                   
                  1.4817E−01 
                 1.4210E−01 
               
               
                   
               
               
                 Surface # 
                 10 
                 11 
                 12 
                 13 
                 14 
                 15 
                 16 
               
               
                   
               
               
                 k = 
                 −7.1110E+01 
                 −7.1158E+00 
                 −1.3323E+01 
                 −1.1249E+01 
                 −4.1320E+01 
                  9.0000E+01 
                 −6.7717E−01 
               
               
                 A4 = 
                 −1.7719E−01 
                  1.8688E−02 
                 −1.1615E−01 
                 −7.0045E−03 
                  1.1758E−01 
                 −1.5458E−01 
                 −2.3409E−01 
               
               
                 A6 = 
                  2.2246E−01 
                 −7.9376E−02 
                  8.3932E−02 
                 −1.1380E−01 
                 −2.7359E−01 
                 −4.4241E−02 
                  8.9372E−02 
               
               
                 A8 = 
                 −3.2705E−01 
                  1.5406E−01 
                  1.5727E−02 
                  6.9597E−02 
                  2.1219E−01 
                  6.5260E−02 
                 −2.2040E−02 
               
               
                 A10 = 
                  3.5118E−01 
                 −1.2072E−01 
                 −3.7500E−02 
                 −6.2686E−05 
                 −9.6810E−02 
                 −2.1900E−02 
                  3.4649E−03 
               
               
                 A12 = 
                 −1.7555E−01 
                  4.4355E−02 
                  1.4389E−02 
                 −2.2126E−02 
                  2.5818E−02 
                  3.4991E−03 
                 −3.5410E−04 
               
               
                 A14 = 
                  1.2374E−02 
                 −1.2442E−02 
                 −1.6963E−03 
                  9.5411E−03 
                 −3.5989E−03 
                 −2.8389E−04 
                  1.9517E−05 
               
               
                 A16 = 
                  8.6880E−03 
                   
                   
                 −1.2031E−03 
                  1.9830E−04 
                  9.7932E−06 
                 −2.6592E−07 
               
               
                   
               
            
           
         
       
     
     In the 4th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in the following table are the same as those stated in the 1st embodiment with corresponding values for the 4th embodiment, so an explanation in this regard will not be provided again. 
     Moreover, these parameters can be calculated from TABLE 7 and TABLE 8 as the following values and satisfy the following conditions: 
     
       
         
           
               
             
               
                   
               
               
                 4th Embodiment 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 f (mm) 
                 3.99 
                 T67/T56 
                 12.14 
               
               
                   
                 Fno 
                 1.70 
                 (ΣCT/CT4) + (ΣAT/T67) 
                 7.69 
               
               
                   
                 HFOV (deg.) 
                 38.3 
                 ΣAT/T67 
                 2.67 
               
               
                   
                 Nmax 
                 1.660 
                 TD/ΣCT 
                 1.40 
               
               
                   
                 Vmin 
                 20.40 
                 TD/EPD 
                 1.70 
               
               
                   
                 CT4/CT1 
                 0.90 
                 TL/lmgH 
                 1.54 
               
               
                   
                 CT4/CT2 
                 2.36 
                 f/R6 
                 1.24 
               
               
                   
                 CT4/CT3 
                 2.18 
                 f/R7 
                 0.47 
               
               
                   
                 CT4/CT5 
                 1.77 
                 f/R11 
                 2.21 
               
               
                   
                 CT4/CT6 
                 1.17 
                 f/R12 
                 0.74 
               
               
                   
                 CT4/CT7 
                 1.66 
                 f/R13 
                 0.03 
               
               
                   
                 T67/T12 
                 8.50 
                 |f1|/|f6| 
                 0.77 
               
               
                   
                 T67/T23 
                 1.44 
                 |f1|/|f7| 
                 0.92 
               
               
                   
                 T67/T34 
                 4.34 
                 f6/f7 
                 −1.20 
               
               
                   
                 T67/T45 
                 1.86 
                 Yc61/Yc62 
                 1.05 
               
               
                   
                   
               
            
           
         
       
     
     5th Embodiment 
       FIG.  9    is a schematic view of an imaging apparatus according to the 5th embodiment of the present disclosure.  FIG.  10    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 5th embodiment. In  FIG.  9   , the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor  595 . The photographing lens assembly includes, in order from an object side to an image side, an aperture stop  500 , a first lens element  510 , a second lens element  520 , a stop  501 , a third lens element  530 , a fourth lens element  540 , a fifth lens element  550 , a sixth lens element  560 , a seventh lens element  570 , an IR-cut filter  580  and an image surface  590 . The image sensor  595  is disposed on the image surface  590  of the photographing lens assembly. The photographing lens assembly includes seven lens elements ( 510 ,  520 ,  530 ,  540 ,  550 ,  560  and  570 ) without additional one or more lens elements inserted between the first lens element  510  and the seventh lens element  570 . 
     The first lens element  510  with positive refractive power has an object-side surface  511  being convex in a paraxial region thereof and an image-side surface  512  being concave in a paraxial region thereof. The first lens element  510  is made of a plastic material, and has the object-side surface  511  and the image-side surface  512  being both aspheric. 
     The second lens element  520  with negative refractive power has an object-side surface  521  being convex in a paraxial region thereof and an image-side surface  522  being concave in a paraxial region thereof. The second lens element  520  is made of a plastic material, and has the object-side surface  521  and the image-side surface  522  being both aspheric. 
     The third lens element  530  with positive refractive power has an object-side surface  531  being concave in a paraxial region thereof and an image-side surface  532  being convex in a paraxial region thereof. The third lens element  530  is made of a plastic material, and has the object-side surface  531  and the image-side surface  532  being both aspheric. Furthermore, the image-side surface  532  of the third lens element  530  includes at least one inflection point. 
     The fourth lens element  540  with positive refractive power has an object-side surface  541  being concave in a paraxial region thereof and an image-side surface  542  being convex in a paraxial region thereof. The fourth lens element  540  is made of a plastic material, and has the object-side surface  541  and the image-side surface  542  being both aspheric. 
     The fifth lens element  550  with negative refractive power has an object-side surface  551  being concave in a paraxial region thereof and an image-side surface  552  being convex in a paraxial region thereof. The fifth lens element  550  is made of a plastic material, and has the object-side surface  551  and the image-side surface  552  being both aspheric. 
     The sixth lens element  560  with positive refractive power has an object-side surface  561  being convex in a paraxial region thereof and an image-side surface  562  being concave in a paraxial region thereof. The sixth lens element  560  is made of a plastic material, and has the object-side surface  561  and the image-side surface  562  being both aspheric. 
     The seventh lens element  570  with negative refractive power has an object-side surface  571  being convex in a paraxial region thereof and an image-side surface  572  being concave in a paraxial region thereof. The seventh lens element  570  is made of a plastic material, and has the object-side surface  571  and the image-side surface  572  being both aspheric. Moreover, the object-side surface  571  of the seventh lens element  570  includes at least one concave shape in an off-axis region thereof, and the image-side surface  572  of the seventh lens element  570  includes at least one convex shape in an off-axis region thereof. Furthermore, each of the object-side surface  571  and the image-side surface  572  of the seventh lens element  570  includes at least two inflection points. Furthermore, each of the object-side surface  571  and the image-side surface  572  of the seventh lens element  570  includes at least two critical points (which can refer to the critical points CP71 and CP72 shown in  FIG.  26   ). 
     The IR-cut filter  580  is made of a glass material and located between the seventh lens element  570  and the image surface  590 , and will not affect the focal length of the photographing lens assembly. 
     The detailed optical data of the 5th embodiment are shown in TABLE 9 and the aspheric surface data are shown in TABLE 10 below. 
     
       
         
           
               
             
               
                 TABLE 9 
               
             
            
               
                   
               
               
                 5th Embodiment 
               
               
                 f = 4.20 mm, Fno = 1.80, HFOV = 39.2 deg. 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface 
                   
                   
                   
                   
                   
                   
                 Focal 
               
               
                 # 
                   
                 Curvature Radius 
                 Thickness 
                 Material 
                 Index 
                 Abbe # 
                 Length 
               
               
                   
               
            
           
           
               
               
               
               
               
            
               
                 0 
                 Object 
                 Plano 
                 Infinity 
                   
               
               
                 1 
                 Ape. Stop 
                 Plano 
                 −0.347 
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 2 
                 Lens 1 
                 2.238 
                 ASP 
                 0.530 
                 Plastic 
                 1.545 
                 56.0 
                 4.17 
               
               
                 3 
                   
                 129.041 
                 ASP 
                 0.040 
                   
                   
                   
                   
               
               
                 4 
                 Lens 2 
                 2.025 
                 ASP 
                 0.230 
                 Plastic 
                 1.645 
                 22.4 
                 −8.00 
               
               
                 5 
                   
                 1.389 
                 ASP 
                 0.420 
                   
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 6 
                 Stop 
                 Plano 
                 0.132 
                   
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 7 
                 Lens 3 
                 −15.077 
                 ASP 
                 0.296 
                 Plastic 
                 1.544 
                 56.0 
                 16.44 
               
               
                 8 
                   
                 −5.652 
                 ASP 
                 0.040 
                   
                   
                   
                   
               
               
                 9 
                 Lens 4 
                 −24.589 
                 ASP 
                 0.815 
                 Plastic 
                 1.544 
                 56.0 
                 9.91 
               
               
                 10 
                   
                 −4.474 
                 ASP 
                 0.143 
                   
                   
                   
                   
               
               
                 11 
                 Lens 5 
                 −1.382 
                 ASP 
                 0.328 
                 Plastic 
                 1.665 
                 20.4 
                 −6.31 
               
               
                 12 
                   
                 −2.257 
                 ASP 
                 0.040 
                   
                   
                   
                   
               
               
                 13 
                 Lens 6 
                 1.593 
                 ASP 
                 0.427 
                 Plastic 
                 1.544 
                 56.0 
                 5.12 
               
               
                 14 
                   
                 3.372 
                 ASP 
                 0.601 
                   
                   
                   
                   
               
               
                 15 
                 Lens 7 
                 1.853 
                 ASP 
                 0.375 
                 Plastic 
                 1.546 
                 54.5 
                 −6.64 
               
               
                 16 
                   
                 1.138 
                 ASP 
                 0.550 
                   
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 17 
                 IR-cut filter 
                 Plano 
                 0.285 
                 Glass 
                 1.517 
                 64.2 
                 — 
               
               
                 18 
                   
                 Plano 
                 0.389 
                   
                   
                   
                   
               
               
                 19 
                 Image 
                 Plano 
                 — 
                   
                   
                   
                   
               
               
                   
               
               
                 Reference wavelength is 587.6 nm (d-line). 
               
               
                 The effective radius of the surface 6 is 1.110 mm. 
               
            
           
         
       
     
     
       
         
           
               
             
               
                 TABLE 10 
               
               
                   
               
               
                 Aspheric Coefficients 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface # 
                 2 
                 3 
                 4 
                 5 
                 7 
                 8 
                 9 
               
               
                   
               
               
                 k = 
                 1.5590E−01 
                 9.0000E+01 
                 −6.1361E+00 
                 −3.9539E+00 
                 −9.0000E+01 
                 −9.0000E+01 
                  1.6178E+00 
               
               
                 A4 = 
                 1.0919E−02 
                 −2.7227E−04  
                 −5.1070E−02 
                  1.8752E−02 
                 −1.5859E−02 
                 −7.8014E−02 
                 −3.2325E−02 
               
               
                 A6 = 
                 −1.2524E−02  
                 6.3556E−02 
                  1.0328E−01 
                 −3.2847E−03 
                 −1.9089E−02 
                  3.8578E−02 
                 −3.8123E−02 
               
               
                 A8 = 
                 3.2473E−02 
                 −9.9493E−02  
                 −1.4527E−01 
                  2.9537E−02 
                 −4.6037E−03 
                 −1.8391E−03 
                  1.0788E−01 
               
               
                 A10 = 
                 −4.3062E−02  
                 7.2577E−02 
                  1.1369E−01 
                 −4.5327E−02 
                  2.7955E−02 
                  2.0013E−02 
                 −7.5178E−02 
               
               
                 A12 = 
                 3.0185E−02 
                 −2.2066E−02  
                 −4.5580E−02 
                  3.2750E−02 
                 −2.6462E−02 
                 −2.1220E−02 
                  2.3377E−02 
               
               
                 A14 = 
                 −8.3539E−03  
                 2.9292E−04 
                  5.4037E−03 
                 −9.3500E−03 
                  8.3186E−03 
                  5.2558E−03 
                 −2.7531E−03 
               
               
                   
               
               
                 Surface # 
                 10 
                 11 
                 12 
                 13 
                 14 
                 15 
                 16 
               
               
                   
               
               
                 k = 
                  2.3284E+00 
                 −9.6017E+00 
                 −3.0263E−01 
                 −1.3474E+01 
                 −2.9606E−01 
                 −1.0665E+01 
                 −4.3278E+00 
               
               
                 A4 = 
                 −2.2960E−02 
                 −1.9011E−01 
                 −9.9587E−02 
                  1.2010E−01 
                  9.7245E−02 
                 −1.3607E−01 
                 −1.1433E−01 
               
               
                 A6 = 
                 −1.7494E−01 
                  1.7842E−01 
                  2.1667E−01 
                 −1.0202E−01 
                 −9.3221E−02 
                  1.9801E−02 
                  3.9075E−02 
               
               
                 A8 = 
                  2.5976E−01 
                 −4.7790E−02 
                 −1.7584E−01 
                  3.4714E−02 
                  3.2941E−02 
                  6.0145E−03 
                 −1.0250E−02 
               
               
                 A10 = 
                 −1.6307E−01 
                 −2.2058E−02 
                  8.1197E−02 
                 −8.5679E−03 
                 −7.0203E−03 
                 −2.3549E−03 
                  1.7712E−03 
               
               
                 A12 = 
                  4.8033E−02 
                  1.9994E−02 
                 −2.0344E−02 
                  1.3607E−03 
                  9.3745E−04 
                  3.2703E−04 
                 −1.7404E−04 
               
               
                 A14 = 
                 −5.2392E−03 
                 −5.3736E−03 
                  2.5659E−03 
                 −9.3379E−05 
                 −7.1995E−05 
                 −2.1339E−05 
                  8.8751E−06 
               
               
                 A16 = 
                   
                  5.0410E−04 
                 −1.2767E−04 
                  6.7672E−07 
                  2.3715E−06 
                  5.4192E−07 
                 −1.8554E−07 
               
               
                   
               
            
           
         
       
     
     In the 5th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in the following table are the same as those stated in the 1st embodiment with corresponding values for the 5th embodiment, so an explanation in this regard will not be provided again. 
     Moreover, these parameters can be calculated from TABLE 9 and TABLE 10 as the following values and satisfy the following conditions: 
     
       
         
           
               
             
               
                   
               
               
                 5th Embodiment 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 f (mm) 
                 4.20 
                 T67/T56 
                 15.03 
               
               
                   
                 Fno 
                 1.80 
                 (ΣCT/CT4) + (ΣAT/T67) 
                 6.04 
               
               
                   
                 HFOV (deg.) 
                 39.2 
                 ΣAT/T67 
                 2.36 
               
               
                   
                 Nmax 
                 1.665 
                 TD/ΣCT 
                 1.47 
               
               
                   
                 Vmin 
                 20.40 
                 TD/EPD 
                 1.89 
               
               
                   
                 CT4/CT1 
                 1.54 
                 TL/lmgH 
                 1.60 
               
               
                   
                 CT4/CT2 
                 3.54 
                 f/R6 
                 −0.74 
               
               
                   
                 CT4/CT3 
                 2.75 
                 f/R7 
                 −0.17 
               
               
                   
                 CT4/CT5 
                 2.48 
                 f/R11 
                 2.64 
               
               
                   
                 CT4/CT6 
                 1.91 
                 f/R12 
                 1.24 
               
               
                   
                 CT4/CT7 
                 2.17 
                 f/R13 
                 2.27 
               
               
                   
                 T67/T12 
                 15.03 
                 |f1|/|f6| 
                 0.82 
               
               
                   
                 T67/T23 
                 1.09 
                 |f1|/|f7| 
                 0.63 
               
               
                   
                 T67/T34 
                 15.03 
                 f6/f7 
                 −0.77 
               
               
                   
                 T67/T45 
                 4.20 
                 Yc61/Yc62 
                 0.84 
               
               
                   
                   
               
            
           
         
       
     
     6th Embodiment 
       FIG.  11    is a schematic view of an imaging apparatus according to the 6th embodiment of the present disclosure.  FIG.  12    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 6th embodiment. In  FIG.  11   , the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor  695 . The photographing lens assembly includes, in order from an object side to an image side, an aperture stop  600 , a first lens element  610 , a second lens element  620 , a stop  601 , a third lens element  630 , a fourth lens element  640 , a fifth lens element  650 , a sixth lens element  660 , a seventh lens element  670 , an IR-cut filter  680  and an image surface  690 . The image sensor  695  is disposed on the image surface  690  of the photographing lens assembly. The photographing lens assembly includes seven lens elements ( 610 ,  620 ,  630 ,  640 ,  650 ,  660  and  670 ) without additional one or more lens elements inserted between the first lens element  610  and the seventh lens element  670 . 
     The first lens element  610  with positive refractive power has an object-side surface  611  being convex in a paraxial region thereof and an image-side surface  612  being concave in a paraxial region thereof. The first lens element  610  is made of a plastic material, and has the object-side surface  611  and the image-side surface  612  being both aspheric. 
     The second lens element  620  with negative refractive power has an object-side surface  621  being convex in a paraxial region thereof and an image-side surface  622  being concave in a paraxial region thereof. The second lens element  620  is made of a plastic material, and has the object-side surface  621  and the image-side surface  622  being both aspheric. 
     The third lens element  630  with negative refractive power has an object-side surface  631  being concave in a paraxial region thereof and an image-side surface  632  being concave in a paraxial region thereof. The third lens element  630  is made of a plastic material, and has the object-side surface  631  and the image-side surface  632  being both aspheric. Furthermore, the image-side surface  632  of the third lens element  630  includes at least one inflection point. 
     The fourth lens element  640  with positive refractive power has an object-side surface  641  being convex in a paraxial region thereof and an image-side surface  642  being convex in a paraxial region thereof. The fourth lens element  640  is made of a plastic material, and has the object-side surface  641  and the image-side surface  642  being both aspheric. 
     The fifth lens element  650  with negative refractive power has an object-side surface  651  being concave in a paraxial region thereof and an image-side surface  652  being convex in a paraxial region thereof. The fifth lens element  650  is made of a plastic material, and has the object-side surface  651  and the image-side surface  652  being both aspheric. 
     The sixth lens element  660  with positive refractive power has an object-side surface  661  being convex in a paraxial region thereof and an image-side surface  662  being concave in a paraxial region thereof. The sixth lens element  660  is made of a plastic material, and has the object-side surface  661  and the image-side surface  662  being both aspheric. 
     The seventh lens element  670  with negative refractive power has an object-side surface  671  being convex in a paraxial region thereof and an image-side surface  672  being concave in a paraxial region thereof. The seventh lens element  670  is made of a plastic material, and has the object-side surface  671  and the image-side surface  672  being both aspheric. Moreover, the object-side surface  671  of the seventh lens element  670  includes at least one concave shape in an off-axis region thereof, and the image-side surface  672  of the seventh lens element  670  includes at least one convex shape in an off-axis region thereof. Furthermore, each of the object-side surface  671  and the image-side surface  672  of the seventh lens element  670  includes at least two inflection points. Furthermore, each of the object-side surface  671  and the image-side surface  672  of the seventh lens element  670  includes at least two critical points. 
     The IR-cut filter  680  is made of a glass material and located between the seventh lens element  670  and the image surface  690 , and will not affect the focal length of the photographing lens assembly. 
     The detailed optical data of the 6th embodiment are shown in TABLE 11 and the aspheric surface data are shown in TABLE 12 below. 
     
       
         
           
               
             
               
                 TABLE 11 
               
             
            
               
                   
               
               
                 6th Embodiment 
               
               
                 f = 4.22 mm, Fno = 1.80, HFOV = 39.3 deg. 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface 
                   
                   
                   
                   
                   
                   
                 Focal 
               
               
                 # 
                   
                 Curvature Radius 
                 Thickness 
                 Material 
                 Index 
                 Abbe# 
                 Length 
               
               
                   
               
            
           
           
               
               
               
               
               
            
               
                 0 
                 Object 
                 Plano 
                 Infinity 
                   
               
               
                 1 
                 Ape. Stop 
                 Plano 
                 −0.362 
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 2 
                 Lens 1 
                 2.169 
                 ASP 
                 0.533 
                 Plastic 
                 1.545 
                 56.0 
                 4.43 
               
               
                 3 
                   
                 19.514 
                 ASP 
                 0.040 
               
               
                 4 
                 Lens 2 
                 2.061 
                 ASP 
                 0.230 
                 Plastic 
                 1.648 
                 22.0 
                 −9.75 
               
               
                 5 
                   
                 1.486 
                 ASP 
                 0.395 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 6 
                 Stop 
                 Plano 
                 0.104 
                   
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 7 
                 Lens 3 
                 −48.674 
                 ASP 
                 0.240 
                 Plastic 
                 1.544 
                 56.0 
                 −30.49 
               
               
                 8 
                   
                 25.203 
                 ASP 
                 0.055 
               
               
                 9 
                 Lens 4 
                 7.925 
                 ASP 
                 0.891 
                 Plastic 
                 1.544 
                 56.0 
                 4.66 
               
               
                 10 
                   
                 −3.584 
                 ASP 
                 0.132 
               
               
                 11 
                 Lens 5 
                 −1.341 
                 ASP 
                 0.413 
                 Plastic 
                 1.664 
                 20.5 
                 −6.42 
               
               
                 12 
                   
                 −2.198 
                 ASP 
                 0.040 
               
               
                 13 
                 Lens 6 
                 1.455 
                 ASP 
                 0.360 
                 Plastic 
                 1.544 
                 56.0 
                 6.10 
               
               
                 14 
                   
                 2.366 
                 ASP 
                 0.638 
               
               
                 15 
                 Lens 7 
                 1.990 
                 ASP 
                 0.375 
                 Plastic 
                 1.552 
                 49.3 
                 −6.36 
               
               
                 16 
                   
                 1.185 
                 ASP 
                 0.500 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 17 
                 IR-cut filter 
                 Plano 
                 0.285 
                 Glass 
                 1.517 
                 64.2 
                 — 
               
               
                 18 
                   
                 Plano 
                 0.410 
               
               
                 19 
                 Image 
                 Plano 
                 — 
               
               
                   
               
               
                 Reference wavelength is 587.6 nm (d-line). 
               
               
                 The effective radius of the surface 6 is 1.110 mm. 
               
            
           
         
       
     
     
       
         
           
               
             
               
                 TABLE 12 
               
               
                   
               
               
                 Aspheric Coefficients 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface # 
                 2 
                 3 
                 4 
                 5 
                 7 
                 8 
                 9 
               
               
                   
               
               
                 k = 
                 1.4554E−01 
                 9.0000E+01 
                 −8.6339E+00 
                 −3.4993E+00 
                 9.0000E+01 
                 9.0000E+01 
                 −9.0000E+01 
               
               
                 A4 = 
                 1.0181E−02 
                 −4.7692E−02  
                 −4.2445E−02 
                 −7.4627E−03 
                 −6.1162E−02  
                 −2.3871E−01  
                 −1.9026E−01 
               
               
                 A6 = 
                 −1.3817E−02  
                 1.7031E−01 
                  1.4381E−01 
                  3.4565E−02 
                 2.6250E−02 
                 1.1276E−01 
                  4.2644E−02 
               
               
                 A8 = 
                 3.7921E−02 
                 −2.5741E−01  
                 −2.3485E−01 
                 −8.0279E−03 
                 −1.7650E−02  
                 1.9325E−01 
                  2.5120E−01 
               
               
                 A10 = 
                 −5.0104E−02  
                 2.0932E−01 
                  2.0280E−01 
                 −2.2941E−02 
                 3.4940E−02 
                 −2.5755E−01  
                 −2.9480E−01 
               
               
                 A12 = 
                 3.4299E−02 
                 −8.6158E−02  
                 −9.0999E−02 
                  2.4988E−02 
                 −3.1021E−02  
                 1.2415E−01 
                  1.3288E−01 
               
               
                 A14 = 
                 −9.3457E−03  
                 1.2736E−02 
                  1.5341E−02 
                 −7.4871E−03 
                 8.7361E−03 
                 −2.2621E−02  
                 −2.1864E−02 
               
               
                   
               
               
                 Surface # 
                 10 
                 11 
                 12 
                 13 
                 14 
                 15 
                 16 
               
               
                   
               
               
                 k = 
                  2.8995E+00 
                 −7.2594E+00 
                 −3.3328E−01 
                 −8.2304E+00 
                 −1.8355E+00 
                 −1.4767E+01 
                 −5.3551E+00 
               
               
                 A4 = 
                 −2.2136E−02 
                 −1.2156E−01 
                 −6.4901E−02 
                  8.5537E−02 
                  6.3905E−02 
                 −1.5883E−01 
                 −1.1418E−01 
               
               
                 A6 = 
                 −1.6201E−01 
                  2.3305E−02 
                  1.3013E−01 
                 −7.6512E−02 
                 −7.8717E−02 
                  4.1388E−02 
                  4.2549E−02 
               
               
                 A8 = 
                  2.5026E−01 
                  1.2120E−01 
                 −8.9939E−02 
                  1.7353E−02 
                  2.9315E−02 
                 −1.1451E−03 
                 −1.1189E−02 
               
               
                 A10 = 
                 −1.6012E−01 
                 −1.4095E−01 
                  2.9761E−02 
                 −7.6782E−04 
                 −6.3269E−03 
                 −1.1595E−03 
                  1.8503E−03 
               
               
                 A12 = 
                  4.7111E−02 
                  7.3124E−02 
                 −1.5833E−03 
                 −8.1392E−04 
                  8.4647E−04 
                  2.2040E−04 
                 −1.7453E−04 
               
               
                 A14 = 
                 −5.1196E−03 
                 −1.8365E−02 
                 −1.1174E−03 
                  2.3978E−04 
                 −6.4951E−05 
                 −1.6674E−05 
                  8.6990E−06 
               
               
                 A16 = 
                   
                  1.7933E−03 
                  1.6626E−04 
                 −2.0131E−05 
                  2.1177E−06 
                  4.7233E−07 
                 −1.8192E−07 
               
               
                   
               
            
           
         
       
     
     In the 6th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in the following table are the same as those stated in the 1st embodiment with corresponding values for the 6th embodiment, so an explanation in this regard will not be provided again. 
     Moreover, these parameters can be calculated from TABLE 11 and TABLE 12 as the following values and satisfy the following conditions: 
     
       
         
           
               
             
               
                   
               
               
                 6th Embodiment 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 f (mm) 
                 4.22 
                 T67/T56 
                 15.95 
               
               
                   
                 Fno 
                 1.80 
                 (ΣCT/CT4) + (ΣAT/T67) 
                 5.61 
               
               
                   
                 HFOV (deg.) 
                 39.3 
                 ΣAT/T67 
                 2.20 
               
               
                   
                 Nmax 
                 1.664 
                 TD/ΣCT 
                 1.46 
               
               
                   
                 Vmin 
                 20.52 
                 TD/EPD 
                 1.90 
               
               
                   
                 CT4/CT1 
                 1.67 
                 TL/lmgH 
                 1.60 
               
               
                   
                 CT4/CT2 
                 3.87 
                 f/R6 
                 0.17 
               
               
                   
                 CT4/CT3 
                 3.71 
                 f/R7 
                 0.53 
               
               
                   
                 CT4/CT5 
                 2.16 
                 f/R11 
                 2.90 
               
               
                   
                 CT4/CT6 
                 2.48 
                 f/R12 
                 1.78 
               
               
                   
                 CT4/CT7 
                 2.38 
                 f/R13 
                 2.12 
               
               
                   
                 T67/T12 
                 15.95 
                 |f1|/|f6| 
                 0.73 
               
               
                   
                 T67/T23 
                 1.28 
                 |f1|/|f7| 
                 0.70 
               
               
                   
                 T67/T34 
                 11.60 
                 f6/f7 
                 −0.96 
               
               
                   
                 T67/T45 
                 4.83 
                 Yc61/Yc62 
                 0.83 
               
               
                   
                   
               
            
           
         
       
     
     7th Embodiment 
       FIG.  13    is a schematic view of an imaging apparatus according to the 7th embodiment of the present disclosure.  FIG.  14    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 7th embodiment. In  FIG.  13   , the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor  795 . The photographing lens assembly includes, in order from an object side to an image side, an aperture stop  700 , a first lens element  710 , a second lens element  720 , a stop  701 , a third lens element  730 , a fourth lens element  740 , a fifth lens element  750 , a sixth lens element  760 , a seventh lens element  770 , an IR-cut filter  780  and an image surface  790 . The image sensor  795  is disposed on the image surface  790  of the photographing lens assembly. The photographing lens assembly includes seven lens elements ( 710 ,  720 ,  730 ,  740 ,  750 ,  760  and  770 ) without additional one or more lens elements inserted between the first lens element  710  and the seventh lens element  770 . 
     The first lens element  710  with positive refractive power has an object-side surface  711  being convex in a paraxial region thereof and an image-side surface  712  being concave in a paraxial region thereof. The first lens element  710  is made of a plastic material, and has the object-side surface  711  and the image-side surface  712  being both aspheric. 
     The second lens element  720  with negative refractive power has an object-side surface  721  being convex in a paraxial region thereof and an image-side surface  722  being concave in a paraxial region thereof. The second lens element  720  is made of a plastic material, and has the object-side surface  721  and the image-side surface  722  being both aspheric. 
     The third lens element  730  with negative refractive power has an object-side surface  731  being convex in a paraxial region thereof and an image-side surface  732  being concave in a paraxial region thereof. The third lens element  730  is made of a plastic material, and has the object-side surface  731  and the image-side surface  732  being both aspheric. Furthermore, each of the object-side surface  731  and the image-side surface  732  of the third lens element  730  includes at least one inflection point. 
     The fourth lens element  740  with positive refractive power has an object-side surface  741  being convex in a paraxial region thereof and an image-side surface  742  being convex in a paraxial region thereof. The fourth lens element  740  is made of a plastic material, and has the object-side surface  741  and the image-side surface  742  being both aspheric. 
     The fifth lens element  750  with negative refractive power has an object-side surface  751  being concave in a paraxial region thereof and an image-side surface  752  being convex in a paraxial region thereof. The fifth lens element  750  is made of a plastic material, and has the object-side surface  751  and the image-side surface  752  being both aspheric. 
     The sixth lens element  760  with positive refractive power has an object-side surface  761  being convex in a paraxial region thereof and an image-side surface  762  being concave in a paraxial region thereof. The sixth lens element  760  is made of a plastic material, and has the object-side surface  761  and the image-side surface  762  being both aspheric. 
     The seventh lens element  770  with negative refractive power has an object-side surface  771  being convex in a paraxial region thereof and an image-side surface  772  being concave in a paraxial region thereof. The seventh lens element  770  is made of a plastic material, and has the object-side surface  771  and the image-side surface  772  being both aspheric. Moreover, the object-side surface  771  of the seventh lens element  770  includes at least one concave shape in an off-axis region thereof, and the image-side surface  772  of the seventh lens element  770  includes at least one convex shape in an off-axis region thereof. Furthermore, each of the object-side surface  771  and the image-side surface  772  of the seventh lens element  770  includes at least two inflection points. Furthermore, each of the object-side surface  771  and the image-side surface  772  of the seventh lens element  770  includes at least two critical points. 
     The IR-cut filter  780  is made of a glass material and located between the seventh lens element  770  and the image surface  790 , and will not affect the focal length of the photographing lens assembly. 
     The detailed optical data of the 7th embodiment are shown in TABLE 13 and the aspheric surface data are shown in TABLE 14 below. 
     
       
         
           
               
             
               
                 TABLE 13 
               
             
            
               
                   
               
               
                 7th Embodiment 
               
               
                 f = 4.22 mm, Fno = 1.80, HFOV = 41.0 deg. 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface 
                   
                   
                   
                   
                   
                   
                 Focal 
               
               
                 # 
                   
                 Curvature Radius 
                 Thickness 
                 Material 
                 Index 
                 Abbe# 
                 Length 
               
               
                   
               
            
           
           
               
               
               
               
               
            
               
                 0 
                 Object 
                 Plano 
                 Infinity 
                   
               
               
                 1 
                 Ape. Stop 
                 Plano 
                 −0.311 
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 2 
                 Lens 1 
                 2.306 
                 ASP 
                 0.500 
                 Plastic 
                 1.545 
                 56.0 
                 4.81 
               
               
                 3 
                   
                 17.750 
                 ASP 
                 0.040 
               
               
                 4 
                 Lens 2 
                 2.101 
                 ASP 
                 0.240 
                 Plastic 
                 1.660 
                 20.4 
                 −10.06 
               
               
                 5 
                   
                 1.523 
                 ASP 
                 0.416 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 6 
                 Stop 
                 Plano 
                 0.091 
                   
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 7 
                 Lens 3 
                 7.527 
                 ASP 
                 0.276 
                 Plastic 
                 1.544 
                 56.0 
                 −20.28 
               
               
                 8 
                   
                 4.416 
                 ASP 
                 0.126 
               
               
                 9 
                 Lens 4 
                 4.976 
                 ASP 
                 0.808 
                 Plastic 
                 1.544 
                 56.0 
                 4.72 
               
               
                 10 
                   
                 −5.007 
                 ASP 
                 0.219 
               
               
                 11 
                 Lens 5 
                 −1.295 
                 ASP 
                 0.310 
                 Plastic 
                 1.660 
                 20.4 
                 −9.27 
               
               
                 12 
                   
                 −1.800 
                 ASP 
                 0.040 
               
               
                 13 
                 Lens 6 
                 1.407 
                 ASP 
                 0.364 
                 Plastic 
                 1.544 
                 56.0 
                 8.45 
               
               
                 14 
                   
                 1.842 
                 ASP 
                 0.653 
               
               
                 15 
                 Lens 7 
                 1.760 
                 ASP 
                 0.379 
                 Plastic 
                 1.534 
                 55.9 
                 −9.57 
               
               
                 16 
                   
                 1.211 
                 ASP 
                 0.550 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 17 
                 IR-cut filter 
                 Plano 
                 0.285 
                 Glass 
                 1.517 
                 64.2 
                 — 
               
               
                 18 
                   
                 Plano 
                 0.345 
               
               
                 19 
                 Image 
                 Plano 
                 — 
               
               
                   
               
               
                 Reference wavelength is 587.6 nm (d-line). 
               
               
                 The effective radius of the surface 6 is 1.150 mm. 
               
               
                 The effective radius of the surface 16 is 3.020 mm. 
               
            
           
         
       
     
     
       
         
           
               
             
               
                 TABLE 14 
               
               
                   
               
               
                 Aspheric Coefficients 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface # 
                 2 
                 3 
                 4 
                 5 
                 7 
                 8 
                 9 
               
               
                   
               
               
                 k = 
                  5.1143E−01 
                 2.8976E+01 
                 −1.2198E+01 
                 −3.0010E+00 
                 2.8315E+01 
                 −9.0000E+01 
                 −1.4825E+01 
               
               
                 A4 = 
                 −2.1610E−04 
                 −2.4388E−02  
                  4.3838E−02 
                 −9.7708E−03 
                 −1.0908E−01  
                 −7.6995E−02 
                 −1.1999E−01 
               
               
                 A6 = 
                 −5.7045E−03 
                 9.3623E−02 
                 −7.7250E−03 
                  4.0220E−02 
                 1.1048E−01 
                  2.8844E−02 
                  1.6010E−01 
               
               
                 A8 = 
                  1.2959E−02 
                 −1.3943E−01  
                 −2.7683E−02 
                 −1.7980E−02 
                 −2.2510E−01  
                 −1.0988E−01 
                 −2.4751E−01 
               
               
                 A10 = 
                 −2.3344E−02 
                 9.7252E−02 
                  1.3230E−02 
                 −2.2625E−02 
                 2.3214E−01 
                  9.0697E−02 
                  1.7812E−01 
               
               
                 A12 = 
                  1.7543E−02 
                 −3.4372E−02  
                  2.1481E−03 
                  2.5187E−02 
                 −1.2873E−01  
                 −2.0458E−02 
                 −5.5434E−02 
               
               
                 A14 = 
                 −5.8781E−03 
                 3.7632E−03 
                 −1.6543E−03 
                 −6.5220E−03 
                 2.9323E−02 
                  1.6207E−04 
                  6.3380E−03 
               
               
                   
               
               
                 Surface # 
                 10 
                 11 
                 12 
                 13 
                 14 
                 15 
                 16 
               
               
                   
               
               
                 k = 
                  5.8083E−01 
                 −2.5201E+00 
                 −6.6509E−01 
                 −4.0340E+00 
                 −7.4077E−01 
                 −1.0545E+01 
                 −5.3023E+00 
               
               
                 A4 = 
                 −1.7282E−01 
                 −1.5451E−01 
                 −8.3921E−02 
                  1.7937E−02 
                  7.5058E−04 
                 −1.7533E−01 
                 −1.2251E−01 
               
               
                 A6 = 
                  1.8002E−01 
                  2.5996E−01 
                  1.7320E−01 
                 −3.2483E−02 
                 −5.7045E−02 
                  4.9811E−02 
                  4.4837E−02 
               
               
                 A8 = 
                 −1.0474E−01 
                 −1.9616E−01 
                 −1.3478E−01 
                 −1.2321E−03 
                  2.5194E−02 
                 −3.6951E−03 
                 −1.1612E−02 
               
               
                 A10 = 
                  2.6362E−02 
                  8.6807E−02 
                  6.1936E−02 
                  5.1019E−03 
                 −6.3076E−03 
                 −6.2791E−04 
                  1.9701E−03 
               
               
                 A12 = 
                 −1.8815E−03 
                 −1.9772E−02 
                 −1.4268E−02 
                 −2.0241E−03 
                  9.7688E−04 
                  1.4873E−04 
                 −1.9568E−04 
               
               
                 A14 = 
                   
                  1.7589E−03 
                  1.3598E−03 
                  3.6988E−04 
                 −8.5855E−05 
                 −1.1285E−05 
                  1.0396E−05 
               
               
                 A16 = 
                   
                   
                 −2.4102E−05 
                 −2.5328E−05 
                  3.1845E−06 
                  3.0399E−07 
                 −2.3201E−07 
               
               
                   
               
            
           
         
       
     
     In the 7th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in the following table are the same as those stated in the 1st embodiment with corresponding values for the 7th embodiment, so an explanation in this regard will not be provided again. 
     Moreover, these parameters can be calculated from TABLE 13 and TABLE 14 as the following values and satisfy the following conditions: 
     
       
         
           
               
             
               
                   
               
               
                 7th Embodiment 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 f (mm) 
                 4.22 
                 T67/T56 
                 16.33 
               
               
                   
                 Fno 
                 1.80 
                 (ΣCT/CT4) + (ΣAT/T67) 
                 5.99 
               
               
                   
                 HFOV (deg.) 
                 41.0 
                 ΣAT/T67 
                 2.43 
               
               
                   
                 Nmax 
                 1.660 
                 TD/ΣCT 
                 1.55 
               
               
                   
                 Vmin 
                 20.40 
                 TD/EPD 
                 1.90 
               
               
                   
                 CT4/CT1 
                 1.62 
                 TL/lmgH 
                 1.51 
               
               
                   
                 CT4/CT2 
                 3.37 
                 f/R6 
                 0.96 
               
               
                   
                 CT4/CT3 
                 2.93 
                 f/R7 
                 0.85 
               
               
                   
                 CT4/CT5 
                 2.61 
                 f/R11 
                 3.00 
               
               
                   
                 CT4/CT6 
                 2.22 
                 f/R12 
                 2.29 
               
               
                   
                 CT4/CT7 
                 2.13 
                 f/R13 
                 2.40 
               
               
                   
                 T67/T12 
                 16.33 
                 |f1|/|f6| 
                 0.57 
               
               
                   
                 T67/T23 
                 1.29 
                 |f1|/|f7| 
                 0.50 
               
               
                   
                 T67/T34 
                 5.18 
                 f6/f7 
                 −0.88 
               
               
                   
                 T67/T45 
                 2.98 
                 Yc61/Yc62 
                 0.83 
               
               
                   
                   
               
            
           
         
       
     
     8th Embodiment 
       FIG.  15    is a schematic view of an imaging apparatus according to the 8th embodiment of the present disclosure.  FIG.  16    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 8th embodiment. In  FIG.  15   , the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor  895 . The photographing lens assembly includes, in order from an object side to an image side, an aperture stop  800 , a first lens element  810 , a second lens element  820 , a stop  801 , a third lens element  830 , a fourth lens element  840 , a fifth lens element  850 , a sixth lens element  860 , a seventh lens element  870 , an IR-cut filter  880  and an image surface  890 . The image sensor  895  is disposed on the image surface  890  of the photographing lens assembly. The photographing lens assembly includes seven lens elements ( 810 ,  820 ,  830 ,  840 ,  850 ,  860  and  870 ) without additional one or more lens elements inserted between the first lens element  810  and the seventh lens element  870 . 
     The first lens element  810  with positive refractive power has an object-side surface  811  being convex in a paraxial region thereof and an image-side surface  812  being concave in a paraxial region thereof. The first lens element  810  is made of a plastic material, and has the object-side surface  811  and the image-side surface  812  being both aspheric. 
     The second lens element  820  with negative refractive power has an object-side surface  821  being convex in a paraxial region thereof and an image-side surface  822  being concave in a paraxial region thereof. The second lens element  820  is made of a plastic material, and has the object-side surface  821  and the image-side surface  822  being both aspheric. 
     The third lens element  830  with negative refractive power has an object-side surface  831  being convex in a paraxial region thereof and an image-side surface  832  being concave in a paraxial region thereof. The third lens element  830  is made of a plastic material, and has the object-side surface  831  and the image-side surface  832  being both aspheric. Furthermore, each of the object-side surface  831  and the image-side surface  832  of the third lens element  830  includes at least one inflection point. 
     The fourth lens element  840  with positive refractive power has an object-side surface  841  being convex in a paraxial region thereof and an image-side surface  842  being convex in a paraxial region thereof. The fourth lens element  840  is made of a plastic material, and has the object-side surface  841  and the image-side surface  842  being both aspheric. 
     The fifth lens element  850  with negative refractive power has an object-side surface  851  being concave in a paraxial region thereof and an image-side surface  852  being convex in a paraxial region thereof. The fifth lens element  850  is made of a plastic material, and has the object-side surface  851  and the image-side surface  852  being both aspheric. Furthermore, the object-side surface  851  of the fifth lens element  850  includes two critical points. 
     The sixth lens element  860  with positive refractive power has an object-side surface  861  being convex in a paraxial region thereof and an image-side surface  862  being concave in a paraxial region thereof. The sixth lens element  860  is made of a plastic material, and has the object-side surface  861  and the image-side surface  862  being both aspheric. 
     The seventh lens element  870  with negative refractive power has an object-side surface  871  being convex in a paraxial region thereof and an image-side surface  872  being concave in a paraxial region thereof. The seventh lens element  870  is made of a plastic material, and has the object-side surface  871  and the image-side surface  872  being both aspheric. Moreover, the object-side surface  871  of the seventh lens element  870  includes at least one concave shape in an off-axis region thereof, and the image-side surface  872  of the seventh lens element  870  includes at least one convex shape in an off-axis region thereof. Furthermore, each of the object-side surface  871  and the image-side surface  872  of the seventh lens element  870  includes at least two inflection points. 
     The IR-cut filter  880  is made of a glass material and located between the seventh lens element  870  and the image surface  890 , and will not affect the focal length of the photographing lens assembly. 
     The detailed optical data of the 8th embodiment are shown in TABLE 15 and the aspheric surface data are shown in TABLE 16 below. 
     
       
         
           
               
             
               
                 TABLE 15 
               
             
            
               
                   
               
               
                 8th Embodiment 
               
               
                 f = 4.21 mm, Fno = 1.70, HFOV = 39.2 deg. 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface 
                   
                   
                   
                   
                   
                   
                 Focal 
               
               
                 # 
                   
                 Curvature Radius 
                 Thickness 
                 Material 
                 Index 
                 Abbe# 
                 Length 
               
               
                   
               
            
           
           
               
               
               
               
               
            
               
                 0 
                 Object 
                 Plano 
                 Infinity 
                   
               
               
                 1 
                 Ape. Stop 
                 Plano 
                 −0.367 
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 2 
                 Lens 1 
                 2.162 
                 ASP 
                 0.576 
                 Plastic 
                 1.545 
                 56.1 
                 4.65 
               
               
                 3 
                   
                 13.329 
                 ASP 
                 0.030 
               
               
                 4 
                 Lens 2 
                 2.268 
                 ASP 
                 0.220 
                 Plastic 
                 1.669 
                 19.5 
                 −10.34 
               
               
                 5 
                   
                 1.641 
                 ASP 
                 0.401 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 6 
                 Stop 
                 Plano 
                 0.082 
                   
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 7 
                 Lens 3 
                 6.327 
                 ASP 
                 0.270 
                 Plastic 
                 1.544 
                 56.0 
                 −26.68 
               
               
                 8 
                   
                 4.340 
                 ASP 
                 0.125 
               
               
                 9 
                 Lens 4 
                 6.751 
                 ASP 
                 0.766 
                 Plastic 
                 1.544 
                 56.0 
                 4.87 
               
               
                 10 
                   
                 −4.180 
                 ASP 
                 0.171 
               
               
                 11 
                 Lens 5 
                 −1.301 
                 ASP 
                 0.312 
                 Plastic 
                 1.639 
                 23.5 
                 −7.69 
               
               
                 12 
                   
                 −1.934 
                 ASP 
                 0.080 
               
               
                 13 
                 Lens 6 
                 1.408 
                 ASP 
                 0.370 
                 Plastic 
                 1.544 
                 56.0 
                 6.80 
               
               
                 14 
                   
                 2.061 
                 ASP 
                 0.715 
               
               
                 15 
                 Lens 7 
                 2.431 
                 ASP 
                 0.397 
                 Plastic 
                 1.534 
                 55.9 
                 −6.59 
               
               
                 16 
                   
                 1.356 
                 ASP 
                 0.500 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 17 
                 IR-cut filter 
                 Plano 
                 0.210 
                 Glass 
                 1.517 
                 64.2 
                 — 
               
               
                 18 
                   
                 Plano 
                 0.318 
               
               
                 19 
                 Image 
                 Plano 
                 — 
               
               
                   
               
               
                 Reference wavelength is 587.6 nm (d-line). 
               
               
                 The effective radius of the surface 6 is 1.140 mm. 
               
               
                 The effective radius of the surface 16 is 3.020 mm. 
               
            
           
         
       
     
     
       
         
           
               
             
               
                 TABLE 16 
               
               
                   
               
               
                 Aspheric Coefficients 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface # 
                 2 
                 3 
                 4 
                 5 
                 7 
                 8 
                 9 
               
               
                   
               
               
                 k = 
                  5.5936E−01 
                 −3.6496E+00 
                 −1.4634E+01 
                 −2.9952E+00 
                 1.6144E+01 
                 −8.1363E+01 
                 −3.0920E+01 
               
               
                 A4 = 
                 −1.4869E−03 
                 −1.5594E−02 
                  5.9394E−02 
                 −6.0565E−03 
                 −9.9918E−02  
                 −3.2133E−02 
                 −7.8849E−02 
               
               
                 A6 = 
                 −1.0819E−02 
                  2.4802E−02 
                 −9.8088E−02 
                  4.0392E−03 
                 4.9263E−02 
                 −1.0386E−01 
                  3.3178E−02 
               
               
                 A8 = 
                  1.6604E−02 
                 −2.2351E−02 
                  1.2618E−01 
                  3.7047E−02 
                 −7.5155E−02  
                  1.4985E−01 
                 −2.6017E−02 
               
               
                 A10 = 
                 −2.4547E−02 
                  1.8300E−03 
                 −1.0182E−01 
                 −4.2750E−02 
                 2.0950E−02 
                 −2.0973E−01 
                 −4.8983E−02 
               
               
                 A12 = 
                  1.6101E−02 
                  3.7414E−03 
                  4.3834E−02 
                  2.0913E−02 
                 1.2686E−02 
                  1.4265E−01 
                  5.3044E−02 
               
               
                 A14 = 
                 −4.7871E−03 
                 −1.8268E−03 
                 −7.4015E−03 
                 −3.3448E−03 
                 −5.2957E−03  
                 −3.1714E−02 
                 −1.2344E−02 
               
               
                   
               
               
                 Surface # 
                 10 
                 11 
                 12 
                 13 
                 14 
                 15 
                 16 
               
               
                   
               
               
                 k = 
                 −1.1340E+00 
                 −2.7404E+00 
                 −6.4856E−01 
                 −7.0120E+00 
                 −4.9462E−01 
                 −1.4270E+01 
                 −5.7426E+00 
               
               
                 A4 = 
                 −1.2977E−01 
                 −6.3418E−02 
                 −5.9835E−02 
                  1.1882E−01 
                  4.4282E−02 
                 −1.9972E−01 
                 −1.2859E−01 
               
               
                 A6 = 
                  1.1565E−01 
                  7.9500E−02 
                  1.2042E−01 
                 −1.7961E−01 
                 −1.0596E−01 
                  1.0754E−01 
                  6.9637E−02 
               
               
                 A8 = 
                 −6.7852E−02 
                 −2.6014E−02 
                 −9.1743E−02 
                  1.3830E−01 
                  5.4846E−02 
                 −5.4035E−02 
                 −3.3344E−02 
               
               
                 A10 = 
                  1.9636E−02 
                 −3.9661E−03 
                  4.5031E−02 
                 −8.6405E−02 
                 −1.6337E−02 
                  2.2875E−02 
                  1.1935E−02 
               
               
                 A12 = 
                 −4.5861E−03 
                  8.5646E−03 
                 −1.1075E−02 
                  3.9901E−02 
                  2.7659E−03 
                 −6.3396E−03 
                 −2.9459E−03 
               
               
                 A14 = 
                  9.4237E−04 
                 −3.0611E−03 
                  1.1480E−03 
                 −1.2520E−02 
                 −1.8576E−04 
                  1.0818E−03 
                  4.7533E−04 
               
               
                 A16 = 
                   
                  3.4064E−04 
                 −3.0542E−05 
                  2.4433E−03 
                 −1.5912E−05 
                 −1.1031E−04 
                 −4.7085E−05 
               
               
                 A18 = 
                   
                   
                   
                 −2.6116E−04 
                  3.5254E−06 
                  6.1863E−06 
                  2.5776E−06 
               
               
                 A20 = 
                   
                   
                   
                  1.1524E−05 
                 −1.7131E−07 
                 −1.4705E−07 
                 −5.9499E−08 
               
               
                   
               
            
           
         
       
     
     In the 8th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in the following table are the same as those stated in the 1st embodiment with corresponding values for the 8th embodiment, so an explanation in this regard will not be provided again. 
     Moreover, these parameters can be calculated from TABLE 15 and TABLE 16 as the following values and satisfy the following conditions: 
     
       
         
           
               
             
               
                   
               
               
                 8th Embodiment 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 f (mm) 
                 4.21 
                 T67/T56 
                 8.94 
               
               
                   
                 Fno 
                 1.70 
                 (ΣCT/CT4) + (ΣAT/T67) 
                 6.04 
               
               
                   
                 HFOV (deg.) 
                 39.2 
                 ΣAT/T67 
                 2.24 
               
               
                   
                 Nmax 
                 1.669 
                 TD/ΣCT 
                 1.55 
               
               
                   
                 Vmin 
                 19.45 
                 TD/EPD 
                 1.82 
               
               
                   
                 CT4/CT1 
                 1.33 
                 TL/lmgH 
                 1.57 
               
               
                   
                 CT4/CT2 
                 3.48 
                 f/R6 
                 0.97 
               
               
                   
                 CT4/CT3 
                 2.84 
                 f/R7 
                 0.62 
               
               
                   
                 CT4/CT5 
                 2.46 
                 f/R11 
                 2.99 
               
               
                   
                 CT4/CT6 
                 2.07 
                 f/R12 
                 2.05 
               
               
                   
                 CT4/CT7 
                 1.93 
                 f/R13 
                 1.73 
               
               
                   
                 T67/T12 
                 23.83 
                 |f1|/|f6| 
                 0.68 
               
               
                   
                 T67/T23 
                 1.48 
                 |f1|/|f7| 
                 0.71 
               
               
                   
                 T67/T34 
                 5.72 
                 f6/f7 
                 −1.03 
               
               
                   
                 T67/T45 
                 4.18 
                 Yc61/Yc62 
                 0.80 
               
               
                   
                   
               
            
           
         
       
     
     9th Embodiment 
       FIG.  17    is a schematic view of an imaging apparatus according to the 9th embodiment of the present disclosure.  FIG.  18    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 9th embodiment. In  FIG.  17   , the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor  995 . The photographing lens assembly includes, in order from an object side to an image side, an aperture stop  900 , a first lens element  910 , a second lens element  920 , a stop  901 , a third lens element  930 , a fourth lens element  940 , a fifth lens element  950 , a sixth lens element  960 , a seventh lens element  970 , an IR-cut filter  980  and an image surface  990 . The image sensor  995  is disposed on the image surface  990  of the photographing lens assembly. The photographing lens assembly includes seven lens elements ( 910 ,  920 ,  930 ,  940 ,  950 ,  960  and  970 ) without additional one or more lens elements inserted between the first lens element  910  and the seventh lens element  970 . 
     The first lens element  910  with positive refractive power has an object-side surface  911  being convex in a paraxial region thereof and an image-side surface  912  being concave in a paraxial region thereof. The first lens element  910  is made of a plastic material, and has the object-side surface  911  and the image-side surface  912  being both aspheric. 
     The second lens element  920  with negative refractive power has an object-side surface  921  being convex in a paraxial region thereof and an image-side surface  922  being concave in a paraxial region thereof. The second lens element  920  is made of a plastic material, and has the object-side surface  921  and the image-side surface  922  being both aspheric. 
     The third lens element  930  with negative refractive power has an object-side surface  931  being convex in a paraxial region thereof and an image-side surface  932  being concave in a paraxial region thereof. The third lens element  930  is made of a plastic material, and has the object-side surface  931  and the image-side surface  932  being both aspheric. Furthermore, each of the object-side surface  931  and the image-side surface  932  of the third lens element  930  includes at least one inflection point. 
     The fourth lens element  940  with positive refractive power has an object-side surface  941  being convex in a paraxial region thereof and an image-side surface  942  being convex in a paraxial region thereof. The fourth lens element  940  is made of a plastic material, and has the object-side surface  941  and the image-side surface  942  being both aspheric. 
     The fifth lens element  950  with negative refractive power has an object-side surface  951  being concave in a paraxial region thereof and an image-side surface  952  being convex in a paraxial region thereof. The fifth lens element  950  is made of a plastic material, and has the object-side surface  951  and the image-side surface  952  being both aspheric. 
     The sixth lens element  960  with positive refractive power has an object-side surface  961  being convex in a paraxial region thereof and an image-side surface  962  being concave in a paraxial region thereof. The sixth lens element  960  is made of a plastic material, and has the object-side surface  961  and the image-side surface  962  being both aspheric. 
     The seventh lens element  970  with negative refractive power has an object-side surface  971  being convex in a paraxial region thereof and an image-side surface  972  being concave in a paraxial region thereof. The seventh lens element  970  is made of a plastic material, and has the object-side surface  971  and the image-side surface  972  being both aspheric. Moreover, the object-side surface  971  of the seventh lens element  970  includes at least one concave shape in an off-axis region thereof, and the image-side surface  972  of the seventh lens element  970  includes at least one convex shape in an off-axis region thereof. Furthermore, each of the object-side surface  971  and the image-side surface  972  of the seventh lens element  970  includes at least two inflection points. 
     The IR-cut filter  980  is made of a glass material and located between the seventh lens element  970  and the image surface  990 , and will not affect the focal length of the photographing lens assembly. 
     The detailed optical data of the 9th embodiment are shown in TABLE 17 and the aspheric surface data are shown in TABLE 18 below. 
     
       
         
           
               
             
               
                 TABLE 17 
               
             
            
               
                   
               
               
                 9th Embodiment 
               
               
                 f = 4.21 mm, Fno = 1.80, HFOV = 41.1 deg. 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface 
                   
                   
                   
                   
                   
                   
                 Focal 
               
               
                 # 
                   
                 Curvature Radius 
                 Thickness 
                 Material 
                 Index 
                 Abbe# 
                 Length 
               
               
                   
               
            
           
           
               
               
               
               
               
            
               
                 0 
                 Object 
                 Plano 
                 Infinity 
                   
               
               
                 1 
                 Ape. Stop 
                 Plano 
                 −0.317 
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 2 
                 Lens 1 
                 2.203 
                 ASP 
                 0.510 
                 Plastic 
                 1.545 
                 56.1 
                 4.57 
               
               
                 3 
                   
                 17.572 
                 ASP 
                 0.030 
               
               
                 4 
                 Lens 2 
                 2.152 
                 ASP 
                 0.220 
                 Plastic 
                 1.669 
                 19.5 
                 −9.96 
               
               
                 5 
                   
                 1.560 
                 ASP 
                 0.410 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 6 
                 Stop 
                 Plano 
                 0.120 
                   
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 7 
                 Lens 3 
                 8.166 
                 ASP 
                 0.250 
                 Plastic 
                 1.544 
                 56.0 
                 −19.16 
               
               
                 8 
                   
                 4.529 
                 ASP 
                 0.118 
               
               
                 9 
                 Lens 4 
                 5.288 
                 ASP 
                 0.784 
                 Plastic 
                 1.544 
                 56.0 
                 5.02 
               
               
                 10 
                   
                 −5.354 
                 ASP 
                 0.190 
               
               
                 11 
                 Lens 5 
                 −1.375 
                 ASP 
                 0.315 
                 Plastic 
                 1.639 
                 23.5 
                 −9.67 
               
               
                 12 
                   
                 −1.926 
                 ASP 
                 0.039 
               
               
                 13 
                 Lens 6 
                 1.426 
                 ASP 
                 0.358 
                 Plastic 
                 1.544 
                 56.0 
                 8.13 
               
               
                 14 
                   
                 1.919 
                 ASP 
                 0.700 
               
               
                 15 
                 Lens 7 
                 1.977 
                 ASP 
                 0.421 
                 Plastic 
                 1.534 
                 55.9 
                 −8.06 
               
               
                 16 
                   
                 1.254 
                 ASP 
                 0.550 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 17 
                 IR-cut filter 
                 Plano 
                 0.210 
                 Glass 
                 1.517 
                 64.2 
                 — 
               
               
                 18 
                   
                 Plano 
                 0.315 
               
               
                 19 
                 Image 
                 Plano 
                 — 
               
               
                   
               
               
                 Reference wavelength is 587.6 nm (d-line). 
               
               
                 The effective radius of the surface 6 is 1.150 mm. 
               
               
                 The effective radius of the surface 16 is 3.020 mm. 
               
            
           
         
       
     
     
       
         
           
               
             
               
                 TABLE 18 
               
               
                   
               
               
                 Aspheric Coefficients 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface # 
                 2 
                 3 
                 4 
                 5 
                 7 
                 8 
                 9 
               
               
                   
               
               
                 k = 
                  4.3603E−01 
                 −8.6633E+01 
                 −1.2986E+01 
                 −2.9712E+00 
                 3.0847E+01 
                 −9.0000E+01 
                 −5.9681E+00 
               
               
                 A4 = 
                 −8.6078E−04 
                 −2.7986E−03 
                  6.4000E−02 
                 −7.9583E−03 
                 −1.0897E−01  
                 −6.8578E−02 
                 −1.1379E−01 
               
               
                 A6 = 
                 −1.5622E−03 
                  2.8061E−02 
                 −8.1243E−02 
                  1.6407E−02 
                 8.9470E−02 
                  1.2515E−02 
                  1.4808E−01 
               
               
                 A8 = 
                 −1.3640E−03 
                 −5.1629E−02 
                  7.6589E−02 
                  1.5592E−02 
                 −1.9418E−01  
                 −9.6222E−02 
                 −2.3536E−01 
               
               
                 A10 = 
                 −8.9686E−03 
                  3.4975E−02 
                 −5.0338E−02 
                 −3.0302E−02 
                 1.8310E−01 
                  6.4403E−02 
                  1.6523E−01 
               
               
                 A12 = 
                  1.0946E−02 
                 −1.3954E−02 
                  1.5271E−02 
                  1.5174E−02 
                 −8.8826E−02  
                  2.9721E−03 
                 −4.8407E−02 
               
               
                 A14 = 
                 −5.3168E−03 
                  1.3206E−03 
                 −5.6196E−04 
                 −1.9353E−03 
                 1.8205E−02 
                 −5.7950E−03 
                  4.9727E−03 
               
               
                   
               
               
                 Surface # 
                 10 
                 11 
                 12 
                 13 
                 14 
                 15 
                 16 
               
               
                   
               
               
                 k = 
                 −8.1654E−01 
                 −2.4569E+00 
                 −6.5119E−01 
                 −4.6522E+00 
                 −6.1048E−01 
                 −1.2847E+01 
                 −5.5055E+00 
               
               
                 A4 = 
                 −1.8899E−01 
                 −1.4268E−01 
                 −7.4429E−02 
                  4.5490E−02 
                  9.2267E−03 
                 −1.6758E−01 
                 −1.1198E−01 
               
               
                 A6 = 
                  2.3483E−01 
                  3.0314E−01 
                  1.7489E−01 
                 −5.5448E−02 
                 −5.2485E−02 
                  4.5464E−02 
                  3.9662E−02 
               
               
                 A8 = 
                 −1.7323E−01 
                 −2.8978E−01 
                 −1.5784E−01 
                  1.5762E−02 
                  1.8645E−02 
                 −1.5484E−03 
                 −1.0003E−02 
               
               
                 A10 = 
                  6.4783E−02 
                  1.6302E−01 
                  8.4904E−02 
                 −3.8396E−03 
                 −3.5852E−03 
                 −1.2511E−03 
                  1.6037E−03 
               
               
                 A12 = 
                 −1.2178E−02 
                 −5.0480E−02 
                 −2.4019E−02 
                  6.4855E−04 
                  4.2641E−04 
                  2.4032E−04 
                 −1.4862E−04 
               
               
                 A14 = 
                  1.0679E−03 
                  7.8417E−03 
                  3.2914E−03 
                 −2.5951E−05 
                 −3.0836E−05 
                 −1.7695E−05 
                  7.4967E−06 
               
               
                 A16 = 
                   
                 −4.7156E−04 
                 −1.7109E−04 
                 −2.7816E−06 
                  9.9335E−07 
                  4.6892E−07 
                 −1.6767E−07 
               
               
                   
               
            
           
         
       
     
     In the 9th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in the following table are the same as those stated in the 1st embodiment with corresponding values for the 9th embodiment, so an explanation in this regard will not be provided again. 
     Moreover, these parameters can be calculated from TABLE 17 and TABLE 18 as the following values and satisfy the following conditions: 
     
       
         
           
               
             
               
                   
               
               
                 9th Embodiment 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 f (mm) 
                 4.21 
                 T67/T56 
                 17.95 
               
               
                   
                 Fno 
                 1.80 
                 (ΣCT/CT4) + (ΣAT/T67) 
                 5.94 
               
               
                   
                 HFOV (deg.) 
                 41.1 
                 ΣAT/T67 
                 2.30 
               
               
                   
                 Nmax 
                 1.669 
                 TD/ΣCT 
                 1.56 
               
               
                   
                 Vmin 
                 19.45 
                 TD/EPD 
                 1.91 
               
               
                   
                 CT4/CT1 
                 1.54 
                 TL/lmgH 
                 1.49 
               
               
                   
                 CT4/CT2 
                 3.56 
                 f/R6 
                 0.93 
               
               
                   
                 CT4/CT3 
                 3.14 
                 f/R7 
                 0.80 
               
               
                   
                 CT4/CT5 
                 2.49 
                 f/R11 
                 2.95 
               
               
                   
                 CT4/CT6 
                 2.19 
                 f/R12 
                 2.19 
               
               
                   
                 CT4/CT7 
                 1.86 
                 f/R13 
                 2.13 
               
               
                   
                 T67/T12 
                 23.33 
                 |f1|/|f6| 
                 0.56 
               
               
                   
                 T67/T23 
                 1.32 
                 |f1|/|f7| 
                 0.57 
               
               
                   
                 T67/T34 
                 5.93 
                 f6/f7 
                 −1.01 
               
               
                   
                 T67/T45 
                 3.68 
                 Yc61/Yc62 
                 0.81 
               
               
                   
                   
               
            
           
         
       
     
     10th Embodiment 
       FIG.  19    is a schematic view of an imaging apparatus according to the 10th embodiment of the present disclosure.  FIG.  20    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 10th embodiment. In  FIG.  19   , the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor  1095 . The photographing lens assembly includes, in order from an object side to an image side, an aperture stop  1000 , a first lens element  1010 , a second lens element  1020 , a stop  1001 , a third lens element  1030 , a fourth lens element  1040 , a fifth lens element  1050 , a sixth lens element  1060 , a seventh lens element  1070 , an  1 R-cut filter  1080  and an image surface  1090 . The image sensor  1095  is disposed on the image surface  1090  of the photographing lens assembly. The photographing lens assembly includes seven lens elements ( 1010 ,  1020 ,  1030 ,  1040 ,  1050 ,  1060  and  1070 ) without additional one or more lens elements inserted between the first lens element  1010  and the seventh lens element  1070 . 
     The first lens element  1010  with positive refractive power has an object-side surface  1011  being convex in a paraxial region thereof and an image-side surface  1012  being concave in a paraxial region thereof. The first lens element  1010  is made of a plastic material, and has the object-side surface  1011  and the image-side surface  1012  being both aspheric. 
     The second lens element  1020  with negative refractive power has an object-side surface  1021  being convex in a paraxial region thereof and an image-side surface  1022  being concave in a paraxial region thereof. The second lens element  1020  is made of a plastic material, and has the object-side surface  1021  and the image-side surface  1022  being both aspheric. 
     The third lens element  1030  with negative refractive power has an object-side surface  1031  being convex in a paraxial region thereof and an image-side surface  1032  being concave in a paraxial region thereof. The third lens element  1030  is made of a plastic material, and has the object-side surface  1031  and the image-side surface  1032  being both aspheric. Furthermore, each of the object-side surface  1031  and the image-side surface  1032  of the third lens element  1030  includes at least one inflection point. 
     The fourth lens element  1040  with positive refractive power has an object-side surface  1041  being convex in a paraxial region thereof and an image-side surface  1042  being convex in a paraxial region thereof. The fourth lens element  1040  is made of a plastic material, and has the object-side surface  1041  and the image-side surface  1042  being both aspheric. 
     The fifth lens element  1050  with negative refractive power has an object-side surface  1051  being concave in a paraxial region thereof and an image-side surface  1052  being convex in a paraxial region thereof. The fifth lens element  1050  is made of a plastic material, and has the object-side surface  1051  and the image-side surface  1052  being both aspheric. 
     The sixth lens element  1060  with positive refractive power has an object-side surface  1061  being convex in a paraxial region thereof and an image-side surface  1062  being concave in a paraxial region thereof. The sixth lens element  1060  is made of a plastic material, and has the object-side surface  1061  and the image-side surface  1062  being both aspheric. 
     The seventh lens element  1070  with negative refractive power has an object-side surface  1071  being convex in a paraxial region thereof and an image-side surface  1072  being concave in a paraxial region thereof. The seventh lens element  1070  is made of a plastic material, and has the object-side surface  1071  and the image-side surface  1072  being both aspheric. Moreover, the object-side surface  1071  of the seventh lens element  1070  includes at least one concave shape in an off-axis region thereof, and the image-side surface  1072  of the seventh lens element  1070  includes at least one convex shape in an off-axis region thereof. Furthermore, each of the object-side surface  1071  and the image-side surface  1072  of the seventh lens element  1070  includes at least two inflection points. 
     The IR-cut filter  1080  is made of a glass material and located between the seventh lens element  1070  and the image surface  1090 , and will not affect the focal length of the photographing lens assembly. 
     The detailed optical data of the 10th embodiment are shown in TABLE 19 and the aspheric surface data are shown in TABLE 20 below. 
     
       
         
           
               
             
               
                 TABLE 19 
               
             
            
               
                   
               
               
                 10th Embodiment 
               
               
                 f = 4.22 mm, Fno = 1.70, HFOV = 39.2 deg. 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface 
                   
                   
                   
                   
                   
                   
                 Focal 
               
               
                 # 
                   
                 Curvature Radius 
                 Thickness 
                 Material 
                 Index 
                 Abbe# 
                 Length 
               
               
                   
               
            
           
           
               
               
               
               
               
            
               
                 0 
                 Object 
                 Plano 
                 Infinity 
                   
               
               
                 1 
                 Ape. Stop 
                 Plano 
                 −0.368 
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 2 
                 Lens 1 
                 2.165 
                 ASP 
                 0.576 
                 Plastic 
                 1.545 
                 56.1 
                 4.66 
               
               
                 3 
                   
                 13.268 
                 ASP 
                 0.030 
               
               
                 4 
                 Lens 2 
                 2.272 
                 ASP 
                 0.220 
                 Plastic 
                 1.669 
                 19.5 
                 −10.33 
               
               
                 5 
                   
                 1.644 
                 ASP 
                 0.396 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 6 
                 Stop 
                 Plano 
                 0.081 
                   
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 7 
                 Lens 3 
                 6.213 
                 ASP 
                 0.267 
                 Plastic 
                 1.544 
                 56.0 
                 −27.42 
               
               
                 8 
                   
                 4.320 
                 ASP 
                 0.130 
               
               
                 9 
                 Lens 4 
                 6.567 
                 ASP 
                 0.764 
                 Plastic 
                 1.544 
                 56.0 
                 4.91 
               
               
                 10 
                   
                 −4.314 
                 ASP 
                 0.174 
               
               
                 11 
                 Lens 5 
                 −1.305 
                 ASP 
                 0.312 
                 Plastic 
                 1.639 
                 23.5 
                 −7.76 
               
               
                 12 
                   
                 −1.937 
                 ASP 
                 0.081 
               
               
                 13 
                 Lens 6 
                 1.408 
                 ASP 
                 0.370 
                 Plastic 
                 1.544 
                 56.0 
                 6.79 
               
               
                 14 
                   
                 2.064 
                 ASP 
                 0.713 
               
               
                 15 
                 Lens 7 
                 2.471 
                 ASP 
                 0.401 
                 Plastic 
                 1.534 
                 55.9 
                 −6.59 
               
               
                 16 
                   
                 1.369 
                 ASP 
                 0.500 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 17 
                 IR-cut filter 
                 Plano 
                 0.210 
                 Glass 
                 1.517 
                 64.2 
                 — 
               
               
                 18 
                   
                 Plano 
                 0.316 
               
               
                 19 
                 Image 
                 Plano 
                 — 
               
               
                   
               
               
                 Reference wavelength is 587.6 nm (d-line). 
               
               
                 The effective radius of the surface 6 is 1.135 mm. 
               
            
           
         
       
     
     
       
         
           
               
             
               
                 TABLE 20 
               
               
                   
               
               
                 Aspheric Coefficients 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface # 
                 2 
                 3 
                 4 
                 5 
                 7 
                 8 
                 9 
               
               
                   
               
               
                 k = 
                  6.1064E−01 
                 −2.8921E+00 
                 −1.4605E+01 
                 −2.9877E+00  
                  1.4665E+01 
                 −7.7178E+01 
                 −2.3915E+01 
               
               
                 A4 = 
                 −2.0116E−03 
                 −1.0951E−02 
                  6.1850E−02 
                 −6.9717E−03  
                 −9.4709E−02 
                 −3.0428E−02 
                 −7.8800E−02 
               
               
                 A6 = 
                 −9.9980E−03 
                  9.3835E−03 
                 −1.0729E−01 
                 7.3356E−03 
                  2.7362E−02 
                 −1.1908E−01 
                  2.1346E−02 
               
               
                 A8 = 
                  1.4088E−02 
                 −3.2594E−03 
                  1.2750E−01 
                 1.8499E−02 
                 −2.4125E−02 
                  1.8618E−01 
                 −1.4023E−03 
               
               
                 A10 = 
                 −2.2357E−02 
                 −9.6511E−03 
                 −8.9549E−02 
                 −1.3737E−02  
                 −4.1325E−02 
                 −2.4472E−01 
                 −6.7570E−02 
               
               
                 A12 = 
                  1.5232E−02 
                  6.8785E−03 
                  3.2252E−02 
                 1.8709E−03 
                  5.0437E−02 
                  1.5757E−01 
                  5.9030E−02 
               
               
                 A14 = 
                 −4.6823E−03 
                 −2.1015E−03 
                 −4.2520E−03 
                 9.2574E−04 
                 −1.4429E−02 
                 −3.4025E−02 
                 −1.3057E−02 
               
               
                   
               
               
                 Surface# 
                 10 
                 11 
                 12 
                 13 
                 14 
                 15 
                 16 
               
               
                   
               
               
                 k = 
                 −1.0788E+00 
                 −2.7448E+00 
                 −6.5616E−01 
                 −7.0651E+00 
                 −4.9568E−01 
                 −1.4470E+01 
                 −5.7248E+00 
               
               
                 A4 = 
                 −1.2004E−01 
                 −5.5938E−02 
                 −6.2812E−02 
                  1.1447E−01 
                  3.8574E−02 
                 −2.0009E−01 
                 −1.2924E−01 
               
               
                 A6 = 
                  8.2517E−02 
                  5.2201E−02 
                  1.2687E−01 
                 −1.6688E−01 
                 −9.2998E−02 
                  1.0974E−01 
                  7.1205E−02 
               
               
                 A8 = 
                 −2.4350E−02 
                  1.5551E−02 
                 −9.7343E−02 
                  1.2305E−01 
                  4.0431E−02 
                 −5.6957E−02 
                 −3.4893E−02 
               
               
                 A10 = 
                 −7.8749E−03 
                 −3.5812E−02 
                  4.7289E−02 
                 −7.6517E−02 
                 −7.3307E−03 
                  2.4551E−02 
                  1.2707E−02 
               
               
                 A12 = 
                  3.9395E−03 
                  2.1606E−02 
                 −1.1424E−02 
                  3.6029E−02 
                 −6.3853E−04 
                 −6.8427E−03 
                 −3.1595E−03 
               
               
                 A14 = 
                 −1.0739E−04 
                 −5.7972E−03 
                  1.1371E−03 
                 −1.1551E−02 
                  6.1445E−04 
                  1.1667E−03 
                  5.0973E−04 
               
               
                 A16 = 
                   
                  5.7193E−04 
                 −2.4812E−05 
                  2.2864E−03 
                 −1.3044E−04 
                 −1.1841E−04 
                 −5.0287E−05 
               
               
                 A18 = 
                   
                   
                   
                 −2.4591E−04 
                  1.2643E−05 
                  6.5927E−06 
                  2.7374E−06 
               
               
                 A20 = 
                   
                   
                   
                  1.0852E−05 
                 −4.7979E−07 
                 −1.5536E−07 
                 −6.2814E−08 
               
               
                   
               
            
           
         
       
     
     In the 10th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in the following table are the same as those stated in the 1st embodiment with corresponding values for the 10th embodiment, so an explanation in this regard will not be provided again. 
     Moreover, these parameters can be calculated from TABLE 19 and TABLE 20 as the following values and satisfy the following conditions: 
     
       
         
           
               
             
               
                   
               
               
                 10th Embodiment 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 f (mm) 
                 4.22 
                 T67/T56 
                 8.80 
               
               
                   
                 Fno 
                 1.70 
                 (ΣCT/CT4) + (ΣAT/T67) 
                 6.06 
               
               
                   
                 HFOV (deg.) 
                 39.2 
                 ΣAT/T67 
                 2.25 
               
               
                   
                 Nmax 
                 1.669 
                 TD/ΣCT 
                 1.55 
               
               
                   
                 Vmin 
                 19.45 
                 TD/EPD 
                 1.82 
               
               
                   
                 CT4/CT1 
                 1.33 
                 TL/lmgH 
                 1.57 
               
               
                   
                 CT4/CT2 
                 3.47 
                 f/R6 
                 0.98 
               
               
                   
                 CT4/CT3 
                 2.86 
                 f/R7 
                 0.64 
               
               
                   
                 CT4/CT5 
                 2.45 
                 f/R11 
                 2.99 
               
               
                   
                 CT4/CT6 
                 2.06 
                 f/R12 
                 2.04 
               
               
                   
                 CT4/CT7 
                 1.91 
                 f/R13 
                 1.71 
               
               
                   
                 T67/T12 
                 23.77 
                 |f1|/|f6| 
                 0.69 
               
               
                   
                 T67/T23 
                 1.49 
                 |f1|/|f7| 
                 0.71 
               
               
                   
                 T67/T34 
                 5.48 
                 f6/f7 
                 −1.03 
               
               
                   
                 T67/T45 
                 4.10 
                 Yc61/Yc62 
                 0.80 
               
               
                   
                   
               
            
           
         
       
     
     11th Embodiment 
       FIG.  21    is a schematic view of an imaging apparatus according to the 11th embodiment of the present disclosure.  FIG.  22    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 11th embodiment. In  FIG.  21   , the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor  1195 . The photographing lens assembly includes, in order from an object side to an image side, an aperture stop  1100 , a first lens element  1110 , a second lens element  1120 , a third lens element  1130 , a fourth lens element  1140 , a fifth lens element  1150 , a sixth lens element  1160 , a seventh lens element  1170 , an IR-cut filter  1180  and an image surface  1190 . The image sensor  1195  is disposed on the image surface  1190  of the photographing lens assembly. The photographing lens assembly includes seven lens elements ( 1110 ,  1120 ,  1130 ,  1140 ,  1150 ,  1160  and  1170 ) without additional one or more lens elements inserted between the first lens element  1110  and the seventh lens element  1170 . 
     The first lens element  1110  with positive refractive power has an object-side surface  1111  being convex in a paraxial region thereof and an image-side surface  1112  being concave in a paraxial region thereof. The first lens element  1110  is made of a plastic material, and has the object-side surface  1111  and the image-side surface  1112  being both aspheric. 
     The second lens element  1120  with negative refractive power has an object-side surface  1121  being convex in a paraxial region thereof and an image-side surface  1122  being concave in a paraxial region thereof. The second lens element  1120  is made of a plastic material, and has the object-side surface  1121  and the image-side surface  1122  being both aspheric. 
     The third lens element  1130  with positive refractive power has an object-side surface  1131  being convex in a paraxial region thereof and an image-side surface  1132  being convex in a paraxial region thereof. The third lens element  1130  is made of a plastic material, and has the object-side surface  1131  and the image-side surface  1132  being both aspheric. Furthermore, the object-side surface  1131  of the third lens element  1130  includes at least one inflection point. 
     The fourth lens element  1140  with negative refractive power has an object-side surface  1141  being convex in a paraxial region thereof and an image-side surface  1142  being concave in a paraxial region thereof. The fourth lens element  1140  is made of a plastic material, and has the object-side surface  1141  and the image-side surface  1142  being both aspheric. 
     The fifth lens element  1150  with positive refractive power has an object-side surface  1151  being concave in a paraxial region thereof and an image-side surface  1152  being convex in a paraxial region thereof. The fifth lens element  1150  is made of a plastic material, and has the object-side surface  1151  and the image-side surface  1152  being both aspheric. 
     The sixth lens element  1160  with positive refractive power has an object-side surface  1161  being convex in a paraxial region thereof and an image-side surface  1162  being concave in a paraxial region thereof. The sixth lens element  1160  is made of a plastic material, and has the object-side surface  1161  and the image-side surface  1162  being both aspheric. 
     The seventh lens element  1170  with negative refractive power has an object-side surface  1171  being convex in a paraxial region thereof and an image-side surface  1172  being concave in a paraxial region thereof. The seventh lens element  1170  is made of a plastic material, and has the object-side surface  1171  and the image-side surface  1172  being both aspheric. Moreover, the object-side surface  1171  of the seventh lens element  1170  includes at least one concave shape in an off-axis region thereof, and the image-side surface  1172  of the seventh lens element  1170  includes at least one convex shape in an off-axis region thereof. 
     The IR-cut filter  1180  is made of a glass material and located between the seventh lens element  1170  and the image surface  1190 , and will not affect the focal length of the photographing lens assembly. 
     The detailed optical data of the 11th embodiment are shown in TABLE 21 and the aspheric surface data are shown in TABLE 22 below. 
     
       
         
           
               
             
               
                 TABLE 21 
               
             
            
               
                   
               
               
                 11th Embodiment 
               
               
                 f = 5.02 mm, Fno = 1.72, HFOV = 41.5 deg. 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface 
                   
                   
                   
                   
                   
                   
                 Focal 
               
               
                 # 
                   
                 Curvature Radius 
                 Thickness 
                 Material 
                 Index 
                 Abbe# 
                 Length 
               
               
                   
               
            
           
           
               
               
               
               
               
            
               
                 0 
                 Object 
                 Plano 
                 Infinity 
                   
               
               
                 1 
                 Ape. Stop 
                 Plano 
                 −0.509 
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 2 
                 Lens 1 
                 2.284 
                 ASP 
                 0.719 
                 Plastic 
                 1.545 
                 56.0 
                 5.37 
               
               
                 3 
                   
                 9.298 
                 ASP 
                 0.153 
               
               
                 4 
                 Lens 2 
                 6.209 
                 ASP 
                 0.230 
                 Plastic 
                 1.681 
                 18.7 
                 −14.89 
               
               
                 5 
                   
                 3.793 
                 ASP 
                 0.356 
               
               
                 7 
                 Lens 3 
                 11.491 
                 ASP 
                 0.570 
                 Plastic 
                 1.544 
                 56.0 
                 18.19 
               
               
                 8 
                   
                 −69.911 
                 ASP 
                 0.408 
               
               
                 10 
                 Lens 4 
                 92.051 
                 ASP 
                 0.511 
                 Plastic 
                 1.660 
                 20.4 
                 −17.72 
               
               
                 11 
                   
                 10.356 
                 ASP 
                 0.132 
               
               
                 12 
                 Lens 5 
                 −5.625 
                 ASP 
                 0.577 
                 Plastic 
                 1.544 
                 56.0 
                 5.81 
               
               
                 13 
                   
                 −2.096 
                 ASP 
                 0.050 
               
               
                 14 
                 Lens 6 
                 3.300 
                 ASP 
                 0.350 
                 Plastic 
                 1.603 
                 28.5 
                 225.10 
               
               
                 15 
                   
                 3.248 
                 ASP 
                 0.785 
               
               
                 16 
                 Lens 7 
                 4.653 
                 ASP 
                 0.360 
                 Plastic 
                 1.515 
                 56.5 
                 −4.59 
               
               
                 17 
                   
                 1.526 
                 ASP 
                 0.500 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 18 
                 IR-cut filter 
                 Plano 
                 0.210 
                 Glass 
                 1.517 
                 64.2 
                 — 
               
               
                 19 
                   
                 Plano 
                 0.393 
               
               
                 20 
                 Image 
                 Plano 
                 — 
               
               
                   
               
               
                 Reference wavelength is 587.6 nm (d-line). 
               
               
                 The effective radius of the surface 9 is 1.800 mm. 
               
               
                 The effective radius of the surface 11 is 2.100 mm. 
               
            
           
         
       
     
     
       
         
           
               
             
               
                 TABLE 22 
               
               
                   
               
               
                 Aspheric Coefficients 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface # 
                 2 
                 3 
                 4 
                 5 
                 6 
                 7 
                 8 
               
               
                   
               
               
                 k = 
                  3.1340E−02 
                 −3.6988E+01 
                 −9.0000E+01 
                 −2.5528E+01 
                 −9.0000E+01 
                  9.0000E+01 
                 −9.0000E+01 
               
               
                 A4 = 
                 −3.1255E−03 
                 −2.8887E−02 
                 −3.8119E−02 
                 −8.2069E−03 
                 −2.9197E−02 
                 −2.9058E−02 
                 −6.1670E−02 
               
               
                 A6 = 
                  1.3373E−02 
                  3.3285E−02 
                  2.2656E−02 
                  1.1253E−02 
                  2.6790E−02 
                 −3.8320E−02 
                 −2.5760E−02 
               
               
                 A8 = 
                 −4.2629E−02 
                 −5.1147E−02 
                 −1.4574E−03 
                 −1.8914E−02 
                 −1.1526E−01 
                  1.0174E−01 
                  5.6553E−02 
               
               
                 A10 = 
                  8.1108E−02 
                  9.4038E−02 
                  2.5000E−02 
                  8.1826E−02 
                  2.2277E−01 
                 −1.8909E−01 
                 −5.3722E−02 
               
               
                 A12 = 
                 −9.5730E−02 
                 −1.2450E−01 
                 −7.0872E−02 
                 −1.6528E−01 
                 −2.8290E−01 
                  2.0630E−01 
                  1.4396E−02 
               
               
                 A14 = 
                  7.0381E−02 
                  1.0219E−01 
                  7.9405E−02 
                  1.7500E−01 
                  2.2934E−01 
                 −1.3955E−01 
                  1.2550E−02 
               
               
                 A16 = 
                 −3.1365E−02 
                 −5.0033E−02 
                 −4.6444E−02 
                 −1.0398E−01 
                 −1.1527E−01 
                  5.7470E−02 
                 −1.2652E−02 
               
               
                 A18 = 
                  7.7403E−03 
                  1.3432E−02 
                  1.4280E−02 
                  3.3204E−02 
                  3.3029E−02 
                 −1.3076E−02 
                  4.5438E−03 
               
               
                 A20 = 
                 −8.1373E−04 
                 −1.5293E−03 
                 −1.8410E−03 
                 −4.4261E−03 
                 −4.0960E−03 
                  1.2454E−03 
                 −6.3237E−04 
               
               
                   
               
               
                 Surface # 
                 9 
                 10 
                 11 
                 12 
                 13 
                 14 
                 15 
               
               
                   
               
               
                 k = 
                 −9.0000E+01 
                 1.8543E+00 
                 −1.4611E+00 
                 −4.5474E+00 
                 −6.5418E+00 
                 −9.0000E+01 
                 −7.4877E+00 
               
               
                 A4 = 
                 −2.5292E−02 
                 4.0997E−02 
                 −2.4529E−03 
                 −4.7785E−02 
                 −3.6911E−02 
                 −1.7844E−01 
                 −9.1210E−02 
               
               
                 A6 = 
                 −1.2483E−01 
                 −1.6785E−01  
                  2.0538E−02 
                  6.6777E−02 
                  3.5489E−02 
                  7.5421E−02 
                  3.8576E−02 
               
               
                 A8 = 
                  2.2894E−01 
                 2.9595E−01 
                 −5.4348E−03 
                 −7.5225E−02 
                 −3.1938E−02 
                 −2.7939E−02 
                 −1.2985E−02 
               
               
                 A10 = 
                 −2.1972E−01 
                 −2.7645E−01  
                 −9.7423E−03 
                  4.6329E−02 
                  1.4773E−02 
                  9.0070E−03 
                  3.1737E−03 
               
               
                 A12 = 
                  1.2813E−01 
                 1.5202E−01 
                  8.9049E−03 
                 −1.9242E−02 
                 −4.3172E−03 
                 −1.9626E−03 
                 −5.1910E−04 
               
               
                 A14 = 
                 −4.7978E−02 
                 −5.1250E−02  
                 −3.3345E−03 
                  5.4060E−03 
                  8.2905E−04 
                  2.6739E−04 
                  5.4467E−05 
               
               
                 A16 = 
                  1.1472E−02 
                 1.0447E−02 
                  6.7529E−04 
                 −9.8276E−04 
                 −9.9488E−05 
                 −2.2004E−05 
                 −3.5181E−06 
               
               
                 A18 = 
                 −1.6197E−03 
                 −1.1818E−03  
                 −7.3557E−05 
                  1.0404E−04 
                  6.6765E−06 
                  1.0060E−06 
                  1.2790E−07 
               
               
                 A20 = 
                  1.0391E−04 
                 5.6896E−05 
                  3.3931E−06 
                 −4.8147E−06 
                 −1.9027E−07 
                 −1.9712E−08 
                 −2.0148E−09 
               
               
                   
               
            
           
         
       
     
     In the 11th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in the following table are the same as those stated in the 1st embodiment with corresponding values for the 11th embodiment, so an explanation in this regard will not be provided again. 
     Moreover, these parameters can be calculated from TABLE 21 and TABLE 22 as the following values and satisfy the following conditions: 
     
       
         
           
               
             
               
                   
               
               
                 11th Embodiment 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 f (mm) 
                 5.02 
                 T67/T56 
                 15.70 
               
               
                   
                 Fno 
                 1.72 
                 (ΣCT/CT4) + (ΣAT/T67) 
                 8.89 
               
               
                   
                 HFOV (deg.) 
                 41.5 
                 ΣAT/T67 
                 2.40 
               
               
                   
                 Nmax 
                 1.681 
                 TD/ΣCT 
                 1.57 
               
               
                   
                 Vmin 
                 18.70 
                 TD/EPD 
                 1.78 
               
               
                   
                 CT4/CT1 
                 0.71 
                 TUImgH 
                 1.40 
               
               
                   
                 CT4/CT2 
                 2.22 
                 f/R6 
                 −0.07 
               
               
                   
                 CT4/CT3 
                 0.90 
                 f/R7 
                 0.05 
               
               
                   
                 CT4/CT5 
                 0.89 
                 f/R11 
                 1.52 
               
               
                   
                 CT4/CT6 
                 1.46 
                 f/R12 
                 1.55 
               
               
                   
                 CT4/CT7 
                 1.42 
                 f/R13 
                 1.08 
               
               
                   
                 T67/T12 
                 5.13 
                 |f1|/|f6| 
                 0.02 
               
               
                   
                 T67/T23 
                 2.21 
                 |f1|/|f7| 
                 1.17 
               
               
                   
                 T67/T34 
                 1.92 
                 f6/f7 
                 −49.04 
               
               
                   
                 T67/T45 
                 5.95 
                 Yc61/Yc62 
                 0.93 
               
               
                   
                   
               
            
           
         
       
     
     12th Embodiment 
       FIG.  23    is a schematic view of an imaging apparatus according to the 12th embodiment of the present disclosure.  FIG.  24    shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 12th embodiment. In  FIG.  23   , the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor  1295 . The photographing lens assembly includes, in order from an object side to an image side, an aperture stop  1200 , a first lens element  1210 , a second lens element  1220 , a third lens element  1230 , a fourth lens element  1240 , a fifth lens element  1250 , a sixth lens element  1260 , a seventh lens element  1270 , an IR-cut filter  1280  and an image surface  1290 . The image sensor  1295  is disposed on the image surface  1290  of the photographing lens assembly. The photographing lens assembly includes seven lens elements ( 1210 ,  1220 ,  1230 ,  1240 ,  1250 ,  1260  and  1270 ) without additional one or more lens elements inserted between the first lens element  1210  and the seventh lens element  1270 . 
     The first lens element  1210  with positive refractive power has an object-side surface  1211  being convex in a paraxial region thereof and an image-side surface  1212  being concave in a paraxial region thereof. The first lens element  1210  is made of a plastic material, and has the object-side surface  1211  and the image-side surface  1212  being both aspheric. 
     The second lens element  1220  with negative refractive power has an object-side surface  1221  being convex in a paraxial region thereof and an image-side surface  1222  being concave in a paraxial region thereof. The second lens element  1220  is made of a plastic material, and has the object-side surface  1221  and the image-side surface  1222  being both aspheric. 
     The third lens element  1230  with positive refractive power has an object-side surface  1231  being convex in a paraxial region thereof and an image-side surface  1232  being concave in a paraxial region thereof. The third lens element  1230  is made of a plastic material, and has the object-side surface  1231  and the image-side surface  1232  being both aspheric. Furthermore, each of the object-side surface  1231  and the image-side surface.  1232  of the third lens element  1230  includes at least one inflection point. 
     The fourth lens element  1240  with negative refractive power has an object-side surface  1241  being convex in a paraxial region thereof and an image-side surface  1242  being concave in a paraxial region thereof. The fourth lens element  1240  is made of a plastic material, and has the object-side surface  1241  and the image-side surface  1242  being both aspheric. 
     The fifth lens element  1250  with positive refractive power has an object-side surface  1251  being concave in a paraxial region thereof and an image-side surface  1252  being convex in a paraxial region thereof. The fifth lens element  1250  is made of a plastic material, and has the object-side surface  1251  and the image-side surface  1252  being both aspheric. 
     The sixth lens element  1260  with negative refractive power has an object-side surface  1261  being convex in a paraxial region thereof and an image-side surface  1262  being concave in a paraxial region thereof. The sixth lens element  1260  is made of a plastic material, and has the object-side surface  1261  and the image-side surface  1262  being both aspheric. 
     The seventh lens element  1270  with negative refractive power has an object-side surface  1271  being convex in a paraxial region thereof and an image-side surface  1272  being concave in a paraxial region thereof. The seventh lens element  1270  is made of a plastic material, and has the object-side surface  1271  and the image-side surface  1272  being both aspheric. Moreover, the object-side surface  1271  of the seventh lens element  1270  includes at least one concave shape in an off-axis region thereof, and the image-side surface  1272  of the seventh lens element  1270  includes at least one convex shape in an off-axis region thereof. Furthermore, each of the object-side surface  1271  and the image-side surface  1272  of the seventh lens element  1270  includes at least two inflection points. 
     The IR-cut filter  1280  is made of a glass material and located between the seventh lens element  1270  and the image surface  1290 , and will not affect the focal length of the photographing lens assembly. 
     The detailed optical data of the 12th embodiment are shown in TABLE 23 and the aspheric surface data are shown in TABLE 24 below. 
     
       
         
           
               
             
               
                 TABLE 23 
               
             
            
               
                   
               
               
                 12th Embodiment 
               
               
                 f = 3.35 mm, Fno = 1.67, HFOV = 45.1 deg. 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface 
                   
                   
                   
                   
                   
                   
                 Focal 
               
               
                 # 
                   
                 Curvature Radius 
                 Thickness 
                 Material 
                 Index 
                 Abbe # 
                 Length 
               
               
                   
               
            
           
           
               
               
               
               
               
            
               
                 0 
                 Object 
                 Plano 
                 Infinity 
                   
               
               
                 1 
                 Ape. Stop 
                 Plano 
                 −0.228 
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 2 
                 Lens 1 
                 2.225 
                 ASP 
                 0.422 
                 Plastic 
                 1.545 
                 56.1 
                 5.32 
               
               
                 3 
                   
                 8.924 
                 ASP 
                 0.050 
               
               
                 4 
                 Lens 2 
                 3.138 
                 ASP 
                 0.230 
                 Plastic 
                 1.681 
                 18.7 
                 −14.03 
               
               
                 5 
                   
                 2.292 
                 ASP 
                 0.192 
               
               
                 6 
                 Lens 3 
                 5.210 
                 ASP 
                 0.376 
                 Plastic 
                 1.544 
                 56.0 
                 12.84 
               
               
                 7 
                   
                 19.993 
                 ASP 
                 0.194 
               
               
                 8 
                 Lens 4 
                 9.149 
                 ASP 
                 0.447 
                 Plastic 
                 1.660 
                 20.4 
                 −255.50 
               
               
                 9 
                   
                 8.509 
                 ASP 
                 0.118 
               
               
                 10 
                 Lens 5 
                 −4.018 
                 ASP 
                 0.694 
                 Plastic 
                 1.544 
                 56.0 
                 2.94 
               
               
                 11 
                   
                 −1.213 
                 ASP 
                 0.050 
               
               
                 12 
                 Lens 6 
                 5.517 
                 ASP 
                 0.350 
                 Plastic 
                 1.681 
                 18.7 
                 −6.69 
               
               
                 13 
                   
                 2.431 
                 ASP 
                 0.308 
               
               
                 14 
                 Lens 7 
                 1.340 
                 ASP 
                 0.360 
                 Plastic 
                 1.544 
                 56.0 
                 −6.25 
               
               
                 15 
                   
                 0.870 
                 ASP 
                 0.550 
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 16 
                 IR-cut filter 
                 Plano 
                 0.175 
                 Glass 
                 1.517 
                 64.2 
                 — 
               
               
                 17 
                   
                 Plano 
                 0.327 
               
               
                 18 
                 Image 
                 Plano 
                 — 
               
               
                   
               
               
                 Reference wavelength is 587.6 nm (d-line). 
               
               
                 The effective radius of the surface 7 is 1.050 mm. 
               
               
                 The effective radius of the surface 9 is 1.230 mm. 
               
            
           
         
       
     
     
       
         
           
               
             
               
                 TABLE 24 
               
               
                   
               
               
                 Aspheric Coefficients 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Surface # 
                 2 
                 3 
                 4 
                 5 
                 6 
                 7 
                 8 
               
               
                   
               
               
                 k = 
                  7.5984E−02 
                 −6.5426E+01 
                 −8.2898E+01 
                 −3.0949E+01 
                 −3.0630E+01 
                 −9.0000E+01 
                 −9.0000E+01 
               
               
                 A4 = 
                 −1.0639E−02 
                 −1.0946E−01 
                  1.0504E−01 
                  1.5961E−01 
                 −2.2860E−02 
                 −7.2766E−02 
                 −1.4052E−01 
               
               
                 A6 = 
                  1.3143E−01 
                  4.0050E−01 
                 −6.5087E−01 
                 −6.0950E−01 
                  3.7289E−02 
                 −1.2002E−01 
                 −7.4190E−02 
               
               
                 A8 = 
                 −8.6104E−01 
                 −1.3209E+00 
                  2.0928E+00 
                  1.0756E+00 
                 −3.5820E−01 
                  7.4087E−01 
                  5.3315E−01 
               
               
                 A10 = 
                  3.3857E+00 
                  3.9208E+00 
                 −4.5952E+00 
                 −5.8789E−01 
                  1.9118E−01 
                 −2.9626E+00 
                 −2.9372E+00 
               
               
                 A12 = 
                 −8.2017E+00 
                 −8.9940E+00 
                  6.2421E+00 
                 −3.2003E+00 
                  1.8988E+00 
                  7.0051E+00 
                  8.4171E+00 
               
               
                 A14 = 
                  1.2298E+01 
                  1.3888E+01 
                 −4.7811E+00 
                  9.4743E+00 
                 −6.6019E+00 
                 −1.0617E+01 
                 −1.3968E+01 
               
               
                 A16 = 
                 −1.1095E+01 
                 −1.3378E+01 
                  1.4127E+00 
                 −1.2004E+01 
                  9.4434E+00 
                  9.8948E+00 
                  1.3406E+01 
               
               
                 A18 = 
                  5.4997E+00 
                  7.2204E+00 
                  5.2289E−01 
                  7.7971E+00 
                 −6.1578E+00 
                 −5.0659E+00 
                 −6.9153E+00 
               
               
                 A20 = 
                 −1.1504E+00 
                 −1.6607E+00 
                 −3.6618E−01 
                 −2.0935E+00 
                  1.5069E+00 
                  1.0773E+00 
                  1.4851E+00 
               
               
                   
               
               
                 Surface # 
                 9 
                 10 
                 11 
                 12 
                 13 
                 14 
                 15 
               
               
                   
               
               
                 k = 
                 −8.5913E+01 
                 −2.0391E−01 
                 −1.2885E+00 
                  5.2246E+00 
                 −2.9714E+00 
                 −4.8668E+00 
                 −2.9926E+00 
               
               
                 A4 = 
                 −1.2752E−01 
                 −1.1733E−01 
                  1.6206E−01 
                  1.9722E−01 
                  5.9228E−02 
                 −2.9028E−01 
                 −2.6422E−01 
               
               
                 A6 = 
                  1.6059E−01 
                  4.2120E−01 
                 −5.4847E−01 
                 −5.9384E−01 
                 −2.5120E−01 
                  6.3726E−02 
                  1.6979E−01 
               
               
                 A8 = 
                 −6.4759E−02 
                 −3.6115E−01 
                  1.2081E+00 
                  8.0929E−01 
                  2.5153E−01 
                  1.0286E−02 
                 −8.3200E−02 
               
               
                 A10 = 
                 −6.5426E−01 
                 −5.3529E−01 
                 −1.8390E+00 
                 −8.0005E−01 
                 −1.5724E−01 
                  5.2096E−03 
                  3.0575E−02 
               
               
                 A12 = 
                  1.4492E+00 
                  1.3972E+00 
                  1.8602E+00 
                  5.3152E−01 
                  6.5665E−02 
                 −8.3431E−03 
                 −7.9610E−03 
               
               
                 A14 = 
                 −1.4976E+00 
                 −1.2766E+00 
                 −1.2140E+00 
                 −2.2087E−01 
                 −1.8253E−02 
                  3.0750E−03 
                  1.3832E−03 
               
               
                 A16 = 
                  8.7800E−01 
                  6.0908E−01 
                  4.9420E−01 
                  4.9993E−02 
                  3.2382E−03 
                 −5.3706E−04 
                 −1.4908E−04 
               
               
                 A18 = 
                 −2.8391E−01 
                 −1.5258E−01 
                 −1.1355E−01 
                 −4.3765E−03 
                 −3.2971E−04 
                  4.6705E−05 
                  8.7391E−06 
               
               
                 A20 = 
                  3.9628E−02 
                  1.5919E−02 
                  1.1155E−02 
                 −6.8776E−05 
                  1.4544E−05 
                 −1.6313E−06 
                 −2.0180E−07 
               
               
                   
               
            
           
         
       
     
     In the 12th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in the following table are the same as those stated in the 1st embodiment with corresponding values for the 12th embodiment, so an explanation in this regard will not be provided again. 
     Moreover, these parameters can be calculated from TABLE 23 and TABLE 24 as the following values and satisfy the following conditions: 
     
       
         
           
               
             
               
                   
               
               
                 12th Embodiment 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
            
               
                   
                 f (mm) 
                 3.35 
                 T67/T56 
                 6.16 
               
               
                   
                 Fno 
                 1.67 
                 (ΣCT/CT4) + (ΣAT/T67) 
                 9.40 
               
               
                   
                 HFOV (deg.) 
                 45.1 
                 ΣAT/T67 
                 2.96 
               
               
                   
                 Nmax 
                 1.681 
                 TD/ΣCT 
                 1.32 
               
               
                   
                 Vmin 
                 18.70 
                 TD/EPD 
                 1.89 
               
               
                   
                 CT4/CT1 
                 1.06 
                 TL/lmgH 
                 1.50 
               
               
                   
                 CT4/CT2 
                 1.94 
                 f/R6 
                 0.17 
               
               
                   
                 CT4/CT3 
                 1.19 
                 f/R7 
                 0.37 
               
               
                   
                 CT4/CT5 
                 0.64 
                 f/R11 
                 0.61 
               
               
                   
                 CT4/CT6 
                 1.28 
                 f/R12 
                 1.38 
               
               
                   
                 CT4/CT7 
                 1.24 
                 f/R13 
                 2.50 
               
               
                   
                 T67/T12 
                 6.16 
                 |f1|/|f6| 
                 0.80 
               
               
                   
                 T67/T23 
                 1.60 
                 |f1|/|f7| 
                 0.85 
               
               
                   
                 T67/T34 
                 1.59 
                 f6/f7 
                 1.07 
               
               
                   
                 T67/T45 
                 2.61 
                 Yc61/Yc62 
                 0.80 
               
               
                   
                   
               
            
           
         
       
     
     13th Embodiment 
       FIG.  28    is a three-dimensional view of an imaging apparatus  10  according to the 13th embodiment of the present disclosure. In  FIG.  28   , the imaging apparatus  10  according to the 13th embodiment is a camera module. The imaging apparatus  10  includes an imaging lens module  11 , a driving apparatus  12  and an image sensor  13 , wherein the imaging lens module  11  includes the photographing lens assembly according to the 1st embodiment and a barrel (its reference numeral is omitted) for carrying the photographing lens assembly. An image of an imaged object can be captured by the imaging apparatus  10  via the imaging lens module  11 , the driving apparatus  12  is used to bring the image into focus so that the image can be clearly formed on the image sensor  13 , and then the image data is generated. 
     The driving apparatus  12  can have an auto-focus functionality, and a driving method thereof can use a voice coil motor (VCM), a micro electro-mechanical system (MEMS), a piezoelectric system or a shape memory alloy system. The driving apparatus  12  enables the photographing lens assembly to obtain a preferable imaging position, so that clear images of the imaged object at different object distances can be obtained. 
     The image sensor  13  of the imaging apparatus  10  can have the properties of high photosensitivity and low noise (such as CMOS and CCD) and is disposed on the image surface of the photographing lens assembly, so that high image quality of the photographing lens assembly can be obtained. 
     Moreover, the imaging apparatus  10  can further include an image stabilizing module  14 . The image stabilizing module  14  can exemplarily include an accelerator, a gyro sensor or a Hall Effect sensor. In the 13th embodiment, the image stabilizing module  14  is a gyro sensor. However, it is only exemplary and the image stabilizing module  14  is not limited thereto. By adjusting to movements in different axial directions of the photographing lens assembly, the image blur due to motion during exposure can be compensated, so that the image quality of dynamic or low-light scenes can be enhanced. Moreover, advanced image compensation functions, such as optical image stabilization (OIS) or electronic image stabilization (EIS), can be provided. 
     14th Embodiment 
       FIG.  29 A  is a schematic view showing a side of an electronic device  20  according to the 14th embodiment of the present disclosure.  FIG.  29 B  is a schematic view showing another side of the electronic device  20  in  FIG.  29 A .  FIG.  29 C  is a block diagram of the electronic device  20  in  FIG.  29 A . In  FIG.  29 A ,  FIG.  29 B  and  FIG.  29 C , the electronic device  20  of the 14th embodiment is a smartphone. The electronic device  20  includes the imaging apparatus  10 , a flash module  21 , a focusing assist module  22 , an image signal processor  23 , a user interface  24  and an image software processor  25 . When a user takes a photograph via the user interface  24 , light rays of the imaged object  26  are focused by the electronic device  20  via the imaging apparatus  10  for generating an image. Meanwhile, light compensation is provided by the flash module  21 , the object distance of the imaged objected  26  is obtained by the focusing assist module  22  for quick focusing, and an optimized image processing is provided by the image signal processor  23  and the image software processor  25 , so that the image quality of the photographing lens assembly can be further enhanced. The focusing assist module  22  can adopt conventional infrared or laser for quick focusing. The user interface  24  can adopt a touch screen or a physical button, and image processing software can be utilized through the user interface  24  for providing a variety of photographing modes and image editing functions. 
     The imaging apparatus  10  of the 14th embodiment can be the same as the imaging apparatus  10  of the 13th embodiment, and are not repeated herein. 
     15th Embodiment 
       FIG.  30    is a schematic view of an electronic device  30  according to the 15th embodiment of the present disclosure. The electronic device  30  of the 15th embodiment is a tablet personal computer. The electronic device  30  includes an imaging apparatus  31 . The imaging apparatus  31  can be the same as that of the 13th embodiment, and will not be repeated herein. 
     16th Embodiment 
       FIG.  31    is a schematic view of an electronic device  40  according to the 16th embodiment of the present disclosure. The electronic device  40  of the 16th embodiment is a wearable device. The electronic device  40  includes an imaging apparatus  41 . The imaging apparatus  41  can be the same as that of the 13th embodiment, and will not be repeated herein. 
     The foregoing description, for purpose of explanation, has been described with reference to specific embodiments. It is to be noted that TABLES 1-24 show different data of the different embodiments; however, the data of the different embodiments are obtained from experiments. The embodiments were chosen and described in order to best explain the principles of the disclosure and its practical applications, to thereby enable others skilled in the art to best utilize the disclosure and various embodiments with various modifications as are suited to the particular use contemplated. The embodiments depicted above and the appended drawings are exemplary and are not intended to be exhaustive or to limit the scope of the present disclosure to the precise forms disclosed. Many modifications and variations are possible in view of the above teachings.