Patent Publication Number: US-2022236540-A1

Title: Photographing lens system, photographing device and electronic apparatus

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     The present disclosure is based upon and claims priority to Chinese Patent Application No. 202110090853.9, filed on Jan. 22, 2021, the entire content of which is incorporated herein by reference. 
     TECHNICAL FIELD 
     The present disclosure relates to a photographing lens system, a photographing device and an electronic apparatus, and more particularly to a photographing lens system and a photographing device suitable for an electronic apparatus such as a mobile terminal. 
     BACKGROUND 
     In the related art, with a development trend of a camera for an intelligent electronic apparatus towards a high pixel, an image plane of an image sensor becomes larger and larger. Under a size limitation, a ratio of a total track length (TTL) to an effective image circle diameter of the image plane becomes lower and lower, showing a low profile trend. In order to keep a balance between a center field of view and an edge field of view in terms of an optical performance, an aspheric lens with at least one inflection point on a surface is often adopted in a system, and a lens with a large difference in curvature on both sides of the inflection point is often used to improve the petzval, field curve and distortion. However, since an angle difference between an incident light close to the inflection point and a lens surface is large when light of each field of view is focused at an infinite object distance and a close object distance respectively, which leads to an optical path difference of the light of each field of view varying greatly. When an imaging system maintains a good image quality of the imaging at the infinite distance, an aberration of the imaging at the closer distance increases greatly and an image resolution performance has a serious drop. 
     SUMMARY 
     According to an aspect of embodiments of the present disclosure, a photographing lens system is provided. The photographing lens system includes a first lens group and a second lens group in sequence from an object side to an image side. The first lens group includes N lenses, and N is an integer greater than 2. In a direction from the object side to the image side, lens one in the first lens group is a first lens, and lens N in the first lens group is a second lens. The first lens is a lens with a positive focal power, and a surface of the first lens facing the object side is a convex surface. The second lens is a lens with a focal power. The second lens group includes at least one lens with a focal power. An air gap between the first lens group and the second lens group is changed in a process of focusing between an infinite distance and a closer distance. A focal length of the first lens group is f1, a focal length of the photographing lens system is f when focused at the infinite distance, and the focal length of the first lens group and the focal length of the photographing lens system when focused at the infinite distance satisfy a following relationship of f1/f: 0.5&lt;f1/f&lt;1.5. 
     According to another aspect of embodiments of the present disclosure, a photographing device is provided. The photographing device includes an image sensor and a photographing lens system, and the image sensor is arranged at an image plane of the photographing lens system. The photographing lens system includes a first lens group and a second lens group in sequence from an object side to an image side. The first lens group includes N lenses, and N is an integer greater than 2. In a direction from the object side to the image side, lens one in the first lens group is a first lens, and lens N in the first lens group is a second lens. The first lens is a lens with a positive focal power, and a surface of the first lens facing the object side is a convex surface. The second lens is a lens with a focal power. The second lens group includes at least one lens with a focal power. An air gap between the first lens group and the second lens group is changed in a process of focusing between an infinite distance and a closer distance. A focal length of the first lens group is f1, a focal length of the photographing lens system is f when focused at the infinite distance, and the focal length of the first lens group and the focal length of the photographing lens system when focused at the infinite distance satisfy a following relationship of f1/f: 0.5&lt;f1/f&lt;1.5. 
     According to another aspect of embodiments of the present disclosure, an electronic apparatus is provided. The electronic apparatus includes an apparatus body and a photographing device, and the photographing device is mounted to the apparatus body. The photographing device includes an image sensor and a photographing lens system, and the image sensor is arranged at an image plane of the photographing lens system. The photographing lens system includes a first lens group and a second lens group in sequence from an object side to an image side. The first lens group includes N lenses, and N is an integer greater than 2. In a direction from the object side to the image side, lens one in the first lens group is a first lens, and lens N in the first lens group is a second lens. The first lens is a lens with a positive focal power, and a surface of the first lens facing the object side is a convex surface. The second lens is a lens with a focal power. The second lens group includes at least one lens with a focal power. An air gap between the first lens group and the second lens group is changed in a process of focusing between an infinite distance and a closer distance. A focal length of the first lens group is f1, a focal length of the photographing lens system is f when focused at the infinite distance, and the focal length of the first lens group and the focal length of the photographing lens system when focused at the infinite distance satisfy a following relationship of f1/f: 0.5&lt;f1/f&lt;1.5. 
     It should be understood that the above general description and the following detailed description are only illustrative and explanatory and cannot be construed as a limitation of the present disclosure. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure. 
         FIG. 1  is a schematic view of a photographing lens system according to an illustrative embodiment of the present disclosure. 
         FIG. 2  is a spherical aberration curve diagram according to an illustrative embodiment of the present disclosure. 
         FIG. 3  is a diagram of astigmatic field curves according to an illustrative embodiment of the present disclosure. 
         FIG. 4  is a distortion curve diagram according to an illustrative embodiment of the present disclosure. 
         FIG. 5  is a schematic view of a photographing lens system according to another illustrative embodiment of the present disclosure. 
         FIG. 6  is a spherical aberration curve diagram according to another illustrative embodiment of the present disclosure. 
         FIG. 7  is a diagram of astigmatic field curves according to another illustrative embodiment of the present disclosure. 
         FIG. 8  is a distortion curve diagram according to another illustrative embodiment of the present disclosure. 
         FIG. 9  is a schematic view of a photographing lens system according to another illustrative embodiment of the present disclosure. 
         FIG. 10  is a spherical aberration curve diagram according to another illustrative embodiment of the present disclosure. 
         FIG. 11  is a diagram of astigmatic field curves according to another illustrative embodiment of the present disclosure. 
         FIG. 12  is a distortion curve diagram according to another illustrative embodiment of the present disclosure. 
         FIG. 13  is a schematic view of a photographing lens system according to another illustrative embodiment of the present disclosure. 
         FIG. 14  is a spherical aberration curve diagram according to another illustrative embodiment of the present disclosure. 
         FIG. 15  is a diagram of astigmatic field curves according to another illustrative embodiment of the present disclosure. 
         FIG. 16  is a distortion curve diagram according to another illustrative embodiment of the present disclosure. 
         FIG. 17  is a schematic view of a photographing lens system according to another illustrative embodiment of the present disclosure. 
         FIG. 18  is a spherical aberration curve diagram according to another illustrative embodiment of the present disclosure. 
         FIG. 19  is a diagram of astigmatic field curves according to another illustrative embodiment of the present disclosure. 
         FIG. 20  is a distortion curve diagram according to another illustrative embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     Illustrative embodiments of the present disclosure will be described in details herein, and the examples thereof are illustrated in the accompanying drawings. When the description below concerns the drawings, same numbers in different drawings represent same or similar elements, unless indicated otherwise. In the following illustrative embodiments, the embodiments illustrated do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims. 
       FIG. 1  is a schematic view of a photographing lens system  100  according to an illustrative embodiment. As illustrated in  FIG. 1 , the photographing lens system  100  includes a first lens group  11  and a second lens group  12  in sequence from an object side to an image side. 
     In this embodiment, as illustrated in  FIG. 1 , the first lens group  11  includes N lenses, and N is an integer greater than 2. The N lenses include at least two aspheric lenses, i.e., the first lens group  11  includes at least two aspheric lenses. Of course, the N lenses may also include at least two spherical lenses, and are not limited to the aspheric lenses in the embodiment of the present disclosure. 
     In this embodiment, N may be 7, that is, the first lens group  11  includes seven lenses, namely lenses  111 ,  112 ,  113 ,  114 ,  115 ,  116  and  117 , respectively. 
     As illustrated in  FIG. 1 , in this embodiment, the first lens group  11  includes: a first lens  111 , a third lens  113 , a fourth lens  114 , a fifth lens  115 , a sixth lens  116 , a seventh lens  117  and a second lens  112  in sequence from the object side to the image side. That is, in a direction Z from the object side to the image side, lens one in the first lens group  11  is the first lens  111 , lens two in the first lens group  11  is the third lens  113 , lens three in the first lens group  11  is the fourth lens  114 , lens four in the first lens group  11  is the fifth lens  115 , lens five in the first lens group  11  is the sixth lens  116 , lens six in the first lens group  11  is the seventh lens  117 , and lens seven in the first lens group  11  is the second lens  112 . In the first lens group  11 , the first lens  111  has a minimum distance from an object plane (not illustrated), and a maximum distance from an image plane  131 . 
     As illustrated in  FIG. 1 , in this embodiment, the first lens  111  includes a first surface  1111  facing the object side and a second surface  1112  facing the image side, the third lens  113  includes a third surface  1131  facing the object side and a fourth surface  1132  facing the image side, the fourth lens  114  includes a fifth surface  1141  facing the object side and a sixth surface  1142  facing the image side, the fifth lens  115  includes a seventh surface  1151  facing the object side and an eighth surface  1152  facing the image side, the sixth lens  116  includes a ninth surface  1161  facing the object side and a tenth surface  1162  facing the image side, the seventh lens  117  includes an eleventh surface  1171  facing the object side and a twelfth surface  1172  facing the image side, and the second lens  112  includes a thirteenth surface  1121  facing the object side and a fourteenth surface  1122  facing the image side. 
     In this embodiment, the first lens  111  is an aspheric lens with a positive focal power, and the first surface  1111  of the first lens  111  facing the object side is a convex surface. The third lens  113  has a negative focal power. The fourth lens  114  has a positive focal power. The fifth lens  115  has a positive focal power. The sixth lens  116  has a negative focal power. The seventh lens  117  has a positive focal power. The second lens  112  is an aspheric lens with a negative focal power. 
     In this embodiment, a curve equation of aspheric surfaces of the first lens  111  and the second lens  112  is shown as follows: 
     
       
         
           
             
               
                 
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     X is an concavity of a curved surface parallel to an optical axis  14 , c is a curvature at a pole of the curved surface, r is a vertical distance between a point on the aspheric surface and the optical axis  14 , k is a conic constant, and A3˜A30 are aspheric coefficients. 
     As illustrated in  FIG. 1 , in this embodiment, the second lens group  12  includes one eighth lens  121  with a negative focal power. The eighth lens  121  includes a fifteenth surface  1211  facing the object side and a sixteenth surface  1212  facing the image side. 
     In this embodiment, an air gap between the first lens group  11  and the second lens group  12  changes in a process of focusing between an infinite distance and a closer distance. It should be noted that the infinite distance and the closer distance are defined in terms of an object. That is, the infinite distance and the closer distance may also be referred to as “the infinite object distance” and “the closer object distance”, respectively. The air gap is a distance between two adjacent lenses or lens groups on the optical axis. In this embodiment, the first lens group  11  and the second lens group  12  moves along the optical axis  14 , respectively, in the process of focusing between the infinite distance and the closer distance. Specifically, in the process of focusing from the infinite distance to the closer distance, the first lens group  11  moves towards the object side along the optical axis  14 , the second lens group  12  moves towards the image side along the optical axis  14 , and the air gap between the first lens group  11  and the second lens group  12  when focused at the closer distance is greater than the air gap between the first lens group  11  and the second lens group  12  when focused at the infinite distance. For example, the air gap between the first lens group  11  and the second lens group  12  may gradually increase, but is not limited to this. In the process of focusing, the first lens group  11  and the second lens group  12  move relative to each other, which may increase the freedom degree and improve the performance at the closer distance. 
     In this embodiment, a focal length of the first lens group  11  is f1, and a focal length of the photographing lens system  100  is f when focused at the infinite distance. The focal length of the first lens group  11  and the focal length of the photographing lens system  100  satisfy a following relationship of f1/f: 
       0.5&lt; f 1/ f&lt; 1.5  (2).
 
     The relationship (2) controls a focal power distribution between the first lens group  11  and the second lens group  12 , which helps to balance a relationship between improving an optical performance and shortening a total track length (TTL). When the value of f1/f is greater than or equal to 1.5, the focal power of the first lens group  11  is too small, a spherical aberration is under-compensated, the total track length is too long, and a volume of the photographing lens system  100  is large. When the value of f1/f is less than or equal to 0.5, the focal power of the first lens group  11  is too large, the spherical aberration is over-compensated, and an emergent light converges rapidly. When an exit main point (an exit pupil position) is more close to the image side, it is not conducive for gradual divergence of light and aberration compensation of an edge field of view. Therefore, when the focal length of the first lens group  11  and the focal length of the photographing lens system  100  satisfy the above relationship (2), the focal power of the first lens group  11  may be controlled within a reasonable range to ensure the balance between the total track length (TTL) and various optical performances. 
     For the convenience of description, “focal length of the photographing lens system  100  when focused at the infinite distance” may be referred to as “focal length of the photographing lens system  100 ” below for short. 
     The focal length of the first lens group  11  and the focal length of the photographing lens system  100  may satisfy a following relationship of f1/f: 
       0.7&lt; f 1/ f&lt; 1.3  (3).
 
     The focal length of the first lens group  11  and the focal length of the photographing lens system  100  may further satisfy a following relationship of f1/f: 
       0.8&lt; f 1/ f&lt; 1.1  (4).
 
     In this embodiment, the photographing lens system  100  includes the first lens group  11  and the second lens group  12  in sequence from the object side to the image side, the first lens group  11  includes at least two aspheric lenses, the lens one in the first lens group  11  is the first lens  111  and the lens seven in the first lens group  11  is the second lens  112  in the direction Z from the object side to the image side, the first lens  111  is the aspheric lens with the positive focal power, the first surface  1111  of the first lens  111  facing the object side is a convex surface, the second lens  112  is the aspheric lens with the negative focal power, and the second lens group  12  includes the eighth lens  121  with the negative focal power. Therefore, through cooperation of the first lens group  11  and the second lens group  12 , the photographing lens system  100  allows an aberration change caused by the first lens group  11  and an aberration change caused by the second lens group  12  to be compensated with each other, in the process of focusing between the infinite distance and the closer distance, so as to maintain a good image resolution ability in the process of focusing between the infinite distance and the closer distance. Moreover, the focal length of the first lens group  11  and the focal length of the photographing lens system  100  satisfy the relationship of f1/f of 0.5&lt;f1/f&lt;1.5. Thus, the balance between the total track length (TTL) and the optical performance may be ensured. 
     In this embodiment, a distance on the optical axis  14  between a vertex of the first surface  1111  of the first lens  111  facing the object side and the image plane  131  is TTL, an effective image height (half of a total diagonal length of an effective imaging area of an image sensor) is IH, and the distance (TTL) on the optical axis  14  between the vertex of the first surface  1111  of the first lens  111  facing the object side and the image plane  131  and the effective image height (IH) satisfy a following relationship of TTH/IH: 
       1.0&lt;TTL/IH&lt;2.0  (5).
 
     When the value of TTL/IH is greater than or equal to 2.0, the total track length is too large and a size of the photographing lens system  100  is too large. When the value of TTL/IH is less than or equal to 1.0, the total track length is too small, the performance of the edge field of view is poor, and a dark corner may occur. Therefore, when the total track length (TTL) and the effective image height (IH) satisfy the above relationship (5), the size of the photographing lens system  100  may be controlled within a reasonable range, so as to realize the miniaturization of the photographing device reasonably. 
     In this embodiment, a focal length of the first lens  111  is fL1, and the focal length of the first lens  111  and the focal length of the photographing lens system  100  satisfy a following relationship of fL1/f: 
       0.5&lt; fL 1/ f&lt; 2.0  (6).
 
     The relationship (6) controls a light convergence ability of the first lens  111 , which helps to shorten the total track length so as to reduce the size of the photographing device. When the value of fL1/f is greater than or equal to 2.0, the focal power of the first lens  111  is small, the main light convergence ability is not enough, the total track length becomes larger, and an overall volume of the photographing lens system  100  is large. When the value of fL1/f is less than or equal to 0.5, the focal power of the first lens  111  is too large, an incident light diverges after being converged, and an divergence angle of an edge light changes greatly in the latter half, resulting in a large aberration, which is not easy to correct. Therefore, when the focal length of the first lens  111  and the focal length of the photographing lens system  100  satisfy the above relationship (6), the focal power of the first lens  111  may be controlled within a reasonable range, and the overall focal power is mainly concentrated on the first lens  111 , which is conducive to shortening the total track length of the photographing lens system  100  and further reducing the size of the photographing lens system  100 . The focal length of the first lens  111  and the focal length of the photographing lens system  100  may satisfy a following relation: 0.6&lt;fL1/f&lt;1.5. The focal length of the first lens  111  and the focal length of the photographing lens system  100  may further satisfy a following relationship of fL1/f: 0.7&lt;fL1/f&lt;1.2. 
     In this embodiment, a variation d of the air gap between the first lens group  11  and the second lens group  12  and the focal length of the first lens group  11  satisfy a following relationship of d/f1: 
       0&lt; d/f 1&lt;0.5  (7).
 
     The relationship (7) controls a relative movement amount between the first lens group  11  and the second lens group  12 , and balances the relationship between the total track length and the improvement of the close-distance performance. The variation of the air gap is an absolute value of a difference of the air gap between the first lens group  11  and the second lens group  12  when focused at the infinite distance and the air gap between the first lens group  11  and the second lens group  12  when focused at the closer distance. 
     When the value of d/f1 is greater than or equal to 0.5, the air gap between the first lens group  11  and the second lens group  12  is relatively large. When the value of d/f1 is equal to 0, the air gap between the first lens group  11  and the second lens group  12  has no relative change, and the infinite-distance and close-distance performances cannot be balanced. The variation d of the air gap between the first lens group  11  and the second lens group  12  and the focal length of the first lens group  11  may satisfy a following relationship of d/f1: 0&lt;d/f1&lt;0.3. The variation d of the air gap between the first lens group  11  and the second lens group  12  and the focal length of the first lens group  11  may further satisfy a following relationship of d/f1: 0&lt;d/f1&lt;0.2. 
     In this embodiment, a focal length of the second lens  112  is fL2, a focal length of the second lens group  12  is f2, and the focal length of the second lens  112  and the focal length of the second lens group  12  satisfy a following relationship of fL2/f2: 
       | fL 2/ f 2|&lt;5.0  (8).
 
     The relationship (8) controls a relationship of a focal power distribution between the second lens  112  and the second lens group  12 . The second lens group  12  shares part of the focal power of the second lens  112 , which is originally used to shorten the back focal length and improve the performance of the edge field of view. Also, the second lens group  12  moves along the optical axis  14 , which is conducive to balancing the requirements of improving the close-distance performance and shortening the back focal length. The second lens  112  may be a positive lens or a negative lens. In most cases, the focal length of the second lens  112  is the same with the focal length of the second lens group  12  in terms of their symbols (their symbols are the same, both positive or both negative). Of course, in other embodiments, the position of the second lens group  12  may also be fixed. 
     When the value of |fL2/f2| is greater than or equal to 5.0, the focal length fL2 is large, the focal power is relatively small, and the focal power of the second lens group  12  is relatively large, which plays a major role in the aberration compensation. When the second lens group  12  moves along the optical axis  14 , the relative movement amount of the first lens group  11  decreases and the movement amount of the second lens group  12  increases, in the process of focusing from the infinite distance to the closer distance. Moreover, the curvature change nearby an inflection point of the sixteenth surface  1212  facing the image side of the eighth lens  121  in the second lens group  12  also increases. If the position of the second lens group  12  is fixed in the process of focusing, a propagation optical path difference of upper and lower lights of each field of view at this lens group will increase in the process of focusing from the infinite distance to the closer distance, which is manifested as a large variation of aberration such as coma (comatic aberration), astigmatism, distortion, chromatic aberration of magnification and a large drop of modulation transfer function (MTF). 
     Therefore, when the focal length of the second lens  112  and the focal length of the second lens group  12  satisfy the above relationship (8), the second lens group  12  may share the focal power of the first lens group  11 , especially the focal power of the lens (i.e. the second lens  112 ) closest to the image plane  131  in the first lens group  11 , so as to reduce the curvature change of the inflection point on the curved surface of the lens (i.e. the second lens  112 ) closest to the image plane  131 . Thus, the change of the optical performance in the process of focusing is reduced, and the close-distance performance is improved. 
     The focal length of the second lens  112  and the focal length of the second lens group  12  may satisfy a following relationship of fL2/f2: 0.03&lt;|fL2/f2|&lt;4.0. The focal length of the second lens  112  and the focal length of the second lens group  12  may further satisfy a following relationship of fL2/f2: 0.05&lt;|fL2/f2|&lt;3.6. 
     In this embodiment, an abbe number of the first lens  111  of the photographing lens system is Vd1, and a refractive index of the first lens  111  is Nd1. The abbe number of the first lens  111  and the refractive index of the first lens  111  satisfy a following relationship of Vd1/Nd1: 
       30.0&lt; Vd 1/ Nd 1&lt;40.0  (9).
 
     The relationship (9) controls the material selection of the first lens  111  and improves the compensation of on-axis chromatic aberration and spherical aberration. When this ratio is greater than or equal to 40.0, the refractive index of the first lens  111  is relatively low, which is not conducive to the compensation of spherical aberration. When this ratio is less than or equal to 30.0, the abbe number of the first lens  111  is relatively small, which is not conducive to the compensation of on-axis chromatic aberration. The abbe number of the first lens  111  and the refractive index of the first lens  111  may satisfy a following relationship of Vd1/Nd1: 32.0&lt;Vd1/Nd1&lt;38.0. The abbe number of the first lens  111  and the refractive index of the first lens  111  may further satisfy a following relationship of Vd1/Nd1: 33.0&lt;Vd1/Nd1&lt;37.0. 
     In this embodiment, the distance on the optical axis  14  between the vertex of the surface facing the object side of the first lens  111  of the photographing lens system and the image plane  131  and the focal length of the photographing lens system  100  satisfy a following relationship of TTL/f: 
       1.0&lt;TTL/ f&lt; 5.0  (10).
 
     The relationship (10) controls the relationship between the total track length and the focal length of the photographing lens system  100 , so as to select a reasonable total track length to satisfy the needs of miniaturization of the photographing device. The distance on the optical axis  14  between the vertex of the surface facing the object side of the first lens  111  of the photographing lens system  100  and the image plane  131  and the focal length of the photographing lens system  100  may satisfy a following relationship of TTL/F: 1.0&lt;TTL/F&lt;3.0. The distance on the optical axis  14  between the vertex of the surface facing the object side of the first lens  111  of the photographing lens system  100  and the image plane  131  and the focal length of the photographing lens system may further satisfy a following relationship of TTL/F: 1.0&lt;TTL/F&lt;2.0. 
     In this embodiment, as illustrated in  FIG. 1 , the photographing lens system  100  may further include a filter element  15  located between the second lens group  12  and the image plane  131  without affecting the focal length of the photographing lens system  100 . The filter element  15  may include, but is not limited to, a low-pass filter, an infrared cut-off filter, a micro lens, and an RGB dichroic filter. 
     In this embodiment, the photographing lens system  100  may further include an aperture to control the amount of light passing through the photographing lens system  100  and entering the image plane  131 . An aperture value of the photographing lens system  100  is Fno, Fno is 2.30, and the focal length f of the photographing lens system  100  is 7.90. 
     In this embodiment, the photographing lens system  100  may further include at least one diaphragm, such as an aperture diaphragm, a blazed diaphragm or a field diaphragm, for reducing stray light. The diaphragm may be located on a side of the first lens group  11  facing the object side. 
     In this embodiment, the focal length f1 of the first lens group  11  is 7.76, and the focal length f2 of the second lens group  12  is −195.79. The value of f1/f is 0.98, the value of TTL/IH is 1.45, the value of fL1/f is 0.91, the value of d/f1 is 0.18, the value of |fL2/f2| is 0.06, the value of Vd1/Nd1 is 36.3, and the value of TTL/f is 1.31. 
     In this embodiment, the structure data of the photographing lens system  100  is illustrated in Table 1, the aspheric data is illustrated in Table 2, in which k is a conical coefficient in an aspheric curve equation, A3˜A18 are aspheric coefficients of 4th-18th order of each surface, and the focal length data of each lens is illustrated in Table 3. 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 1 
               
               
                   
               
               
                 Num 
                 R′ 
                 thi 
                 Nd 
                 Vd 
                 radius 
               
               
                   
               
             
            
               
                 1(STO) 
                 plane 
                 −0.38  
                   
                   
                   
               
               
                 2 
                 4.005 
                 0.72 
                 1.543 
                 56.0 
                 1.7 
               
               
                 3 
                 −237.079 
                 0.10 
               
               
                 4 
                 4.042 
                 0.36 
                 1.632 
                 24.0 
                 1.6 
               
               
                 5 
                 2.726 
                 0.50 
               
               
                 6 
                 −19.416 
                 0.63 
                 1.543 
                 56.0 
                 1.5 
               
               
                 7 
                 −6.735 
                 0.57 
               
               
                 8 
                 −6.134 
                 0.59 
                 1.543 
                 56.0 
                 1.8 
               
               
                 9 
                 −5.641 
                 0.80 
               
               
                 10 
                 −2.817 
                 0.32 
                 1.667 
                 19.2 
                 2.2 
               
               
                 11 
                 −4.439 
                 0.10 
               
               
                 12 
                 −3.162 
                 0.74 
                 1.543 
                 56.0 
                 2.8 
               
               
                 13 
                 −1.862 
                 0.35 
               
               
                 14 
                 4.197 
                 1.11 
                 1.534 
                 55.7 
                 5.0 
               
               
                 15 
                 2.213 
                 d15 
               
               
                 16 
                 −446.274 
                 0.70 
                 1.566 
                 37.4 
                 5.8 
               
               
                 17 
                 148.869 
                 d17 
               
               
                 18 
                 plane 
                 0.21 
                 1.516 
                 64.2 
                 7.0 
               
               
                 19 
                 plane 
                 0.52 
               
               
                 20 
                 image plane 
                 — 
               
               
                   
               
            
           
         
       
     
     Num denotes ordinal numbers of surfaces arranged in sequence from the object side to the image side. For example, surface one is the seventeenth surface (not illustrated) of the aperture diaphragm (STO), surface two is the first surface  1111  of the first lens  111 , surface three is the second surface  1112  of the first lens  111 , . . . , and surface fourteen is the thirteenth surface  1121  of the second lens  112 , surface fifteen is the fourteenth surface  1112  of the second lens  112 , surface sixteen is the fifteenth surface  1211  of the eighth lens  121 , surface seventeen is the sixteenth surface  1212  of the eighth lens  121 , surface eighteen is an eighteenth surface  151  of the filter element  15  facing the object side, surface nineteen is a nineteenth surface  152  of the filter element  15  facing the image side, and surface twenty is the image plane  131 . R′ is the curvature, this is a thickness on the optical axis  14 , Nd is the refractive index, Vd is the abbe number, d15 is the air gap between surface fifteen and surface sixteen, that is, the air gap between the first lens group  11  and the second lens group  12 , d17 is the air gap between the surface seventeen and the surface eighteen, that is, the air gap between the second lens group  12  and the eighteenth surface  151 , the radius is half of the aperture of the lens, and the plane is an air plane. A blank indicates that there is no corresponding data. 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 2 
               
               
                   
               
             
            
               
                 Num 
                 K 
                 A3 
                 A4 
                 A5 
                 A6 
               
               
                   
               
               
                 2 
                 3.01889E+00 
                   
                 −5.70983E−03 
                   
                 −1.17554E−03 
               
               
                 3 
                 1.50000E+01 
                   
                 −1.96908E−03 
                   
                  2.59522E−03 
               
               
                 4 
                 2.78949E+00 
                   
                 −2.66254E−02 
                   
                  2.90687E−03 
               
               
                 5 
                 4.92274E−01 
                   
                 −2.61884E−02 
                   
                  1.31550E−03 
               
               
                 6 
                 1.40069E+01 
                   
                 −5.10454E−03 
                   
                 −1.59333E−03 
               
               
                 7 
                 1.16377E+01 
                   
                 −8.56486E−03 
                   
                 −1.71535E−03 
               
               
                 8 
                 9.10606E+00 
                   
                 −1.56990E−02 
                   
                 −2.25898E−03 
               
               
                 9 
                 4.84411E+00 
                   
                 −1.06696E−02 
                   
                 −6.82839E−04 
               
               
                 10 
                 5.09981E−01 
                 −7.46574E−03 
                 −1.21894E−02 
                 1.12429E−03 
                  1.16897E−03 
               
               
                 11 
                 8.77278E−01 
                 −2.55539E−02 
                 −9.84962E−03 
                 2.70470E−03 
                  2.88956E−04 
               
               
                 12 
                 −4.72169E+00  
                 −4.13285E−02 
                  1.43266E−02 
                 1.23020E−03 
                 −1.43470E−03 
               
               
                 13 
                 −3.17194E+00  
                 −4.22734E−02 
                  6.71859E−03 
                 1.85055E−03 
                  5.44784E−04 
               
               
                 14 
                 −7.14613E−01  
                 −3.04334E−02 
                 −5.87092E−03 
                 3.61378E−04 
                  4.58818E−04 
               
               
                 15 
                 −7.07016E+00  
                  1.08010E−02 
                 −1.82434E−02 
                 4.54043E−03 
                 −2.34127E−04 
               
               
                 16 
                 9.90000E+01 
                   
                  3.39060E−03 
                   
                 −9.59427E−04 
               
               
                 17 
                 0.00000E+00 
                   
                  3.41735E−03 
                   
                 −7.08980E−04 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 Num 
                 A7 
                 A8 
                 A9 
                 A10 
                 A11 
                 A12 
               
               
                   
               
               
                 2 
                   
                 −1.43157E−04 
                   
                 −1.13920E−04 
                   
                  2.19452E−05 
               
               
                 3 
                   
                 −1.62355E−03 
                   
                  4.93536E−04 
                   
                 −5.42575E−05 
               
               
                 4 
                   
                 −6.61849E−04 
                   
                 −1.26593E−04 
                   
                  2.06580E−05 
               
               
                 5 
                   
                 −3.47058E−04 
                   
                  3.27593E−05 
                   
                 −6.73652E−05 
               
               
                 6 
                   
                 −3.18691E−04 
                   
                 −2.23064E−04 
                   
                  5.40608E−05 
               
               
                 7 
                   
                 −8.46788E−05 
                   
                  1.11259E−06 
                   
                 −4.40208E−06 
               
               
                 8 
                   
                  3.36420E−04 
                   
                 −6.66879E−05 
                   
                  2.75333E−06 
               
               
                 9 
                   
                  4.10659E−05 
                   
                  1.76404E−06 
                   
                 −3.19988E−06 
               
               
                 10 
                  5.99811E−04 
                  5.43183E−04 
                  2.26950E−05 
                 −2.36020E−05 
                 −9.51703E−06 
                 −7.39560E−06 
               
               
                 11 
                  3.89584E−05 
                  1.93256E−04 
                 −6.00530E−06 
                 −7.38955E−06 
                 −3.27178E−07 
                 −4.80698E−07 
               
               
                 12 
                 −8.57413E−05 
                  1.17000E−04 
                 −1.11719E−05 
                 −8.00073E−06 
                  6.82795E−07 
                  5.31081E−07 
               
               
                 13 
                  5.98284E−05 
                 −3.61261E−05 
                 −3.22361E−06 
                  3.01627E−07 
                 −2.91180E−07 
                 −6.81983E−08 
               
               
                 14 
                 −3.63090E−06 
                 −1.25893E−05 
                  5.86011E−08 
                  9.67036E−08 
                 −6.58743E−09 
                  2.24460E−09 
               
               
                 15 
                 −5.09389E−05 
                 −1.88288E−06 
                  1.05713E−06 
                  1.03023E−07 
                 −2.44378E−09 
                 −1.78269E−09 
               
               
                 16 
                   
                  1.11669E−04 
                   
                 −7.76837E−06 
                   
                  3.29479E−07 
               
               
                 17 
                   
                  6.57404E−05 
                   
                 −3.68438E−06 
                   
                  1.27133E−07 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 Num 
                 A13 
                 A14 
                 A15 
                 A16 
                 A17 
                 A18 
               
               
                   
               
               
                 2 
                   
                 8.16744E−06 
                   
                 −4.37148E−06 
                   
                 0.00000E+00 
               
               
                 3 
                   
                 −5.51882E−06  
                   
                  0.00000E+00 
                   
                 0.00000E+00 
               
               
                 4 
                   
                 1.38976E−05 
                   
                 −6.76230E−06 
                   
                 0.00000E+00 
               
               
                 5 
                   
                 1.50101E−05 
                   
                 −3.13495E−06 
                   
                 0.00000E+00 
               
               
                 6 
                   
                 8.10138E−07 
                   
                 −5.05539E−06 
                   
                 0.00000E+00 
               
               
                 7 
                   
                 −5.79425E−06  
                   
                  1.93324E−06 
                   
                 0.00000E+00 
               
               
                 8 
                   
                 4.19015E−06 
                   
                  1.88127E−07 
                   
                 0.00000E+00 
               
               
                 9 
                   
                 8.78525E−07 
                   
                 −2.59754E−07 
                   
                 0.00000E+00 
               
               
                 10 
                 −9.22831E−07 
                 −5.64015E−08  
                 1.20095E−07 
                  7.60767E−08 
                  1.90789E−08 
                 1.45405E−09 
               
               
                 11 
                 −8.28190E−08 
                 −2.09069E−08  
                 −1.29533E−08  
                 −4.58154E−09 
                 −1.87881E−09 
                 −1.81806E−09  
               
               
                 12 
                  1.61648E−07 
                 4.20577E−08 
                 7.27003E−09 
                 −4.93412E−10 
                 −1.06413E−09 
                 −5.77179E−10  
               
               
                 13 
                 −3.64097E−09 
                 2.20801E−09 
                 1.29026E−09 
                  4.20396E−10 
                  4.44238E−11 
                 −3.52193E−11  
               
               
                 14 
                 −1.19237E−10 
                 −1.45713E−11  
                 5.45309E−12 
                 −9.14195E−13 
                 −1.06318E−14 
                 3.37733E−15 
               
               
                 15 
                 −1.99328E−10 
                 1.34751E−11 
                 2.59770E−12 
                  1.32398E−12 
                  5.11284E−14 
                 −6.28246E−14  
               
               
                 16 
                   
                 −8.47157E−09  
                   
                  1.22099E−10 
                   
                 −7.58379E−13  
               
               
                 17 
                   
                 −2.68282E−09  
                   
                  3.20050E−11 
                   
                 −1.65995E−13  
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
             
               
                 TABLE 3 
               
               
                   
               
               
                 Element 
                 Start surface 
                 Focal length 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
            
               
                 1 
                 2 
                 7.22 
               
               
                 2 
                 4 
                 −14.66 
               
               
                 3 
                 6 
                 18.57 
               
               
                 4 
                 8 
                 90.33 
               
               
                 5 
                 10 
                 −12.37 
               
               
                 6 
                 12 
                 6.91 
               
               
                 7 
                 14 
                 −10.84 
               
               
                 8 
                 16 
                 −195.79 
               
               
                   
               
            
           
         
       
     
     Element denotes ordinal numbers of the lenses arranged in sequence from the object side to the image side, and start surface is an ordinal number of a start surface of the lens. The start surface is the surface close to the object side. 
     In this embodiment, as illustrated in Table 3, the focal length of the first lens  111  is 7.22, the focal length of the second lens  112  is −10.84, the focal length of the third lens  113  is −14.66, the focal length of the fourth lens  114  is 18.57, the focal length of the fifth lens  115  is 90.33, the focal length of the sixth lens  116  is −12.37, the focal length of the seventh lens  117  is 6.91, and the focal length of the eighth lens  121  is −195.79. 
     In this embodiment, when the distance of the object to be photographed is the infinite distance (INF) or the closer distance (100 mm), the data of d15 and d17 is illustrated in Table 4. 
     
       
         
           
               
               
               
             
               
                   
                 TABLE 4 
               
               
                   
                   
               
               
                   
                 infinite distance 
                 closer distance 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
            
               
                 Distance of object to be photographed 
                 INF 
                 100 mm 
               
               
                 d15 
                 0.93 
                 2.40 
               
               
                 d17 
                 1.10 
                 0.40 
               
               
                   
               
            
           
         
       
     
     As can be seen from Table 4, d15 is 0.93 and d17 is 1.10 when the distance of the object to be photographed is the infinite distance (INF), and d15 is 2.40 and d17 is 0.40 when the distance of the object to be photographed is the closer distance (100 mm). 
     In this embodiment, a spherical aberration (LONGITUDINAL SPHERICAL ABER.) curve diagram of the photographing lens system  100  is illustrated in  FIG. 2 , a diagram of astigmatic field curves is illustrated in  FIG. 3 , and a distortion curve diagram is illustrated in  FIG. 4 . In  FIG. 2 , a horizontal axis denotes a focus offset in millimeters, and a vertical axis denotes an on-axis incident distance in millimeters when light enters the lens.  FIG. 2  shows a spherical aberration curve of an incident light with a wavelength of 656.3000 NM (nanometer), a spherical aberration curve of an incident light with a wavelength of 587.6000 NM and a spherical aberration curve of an incident light with a wavelength of 486.0000 NM. In  FIG. 3 , a horizontal axis denotes the focus offset in millimeters, and a vertical axis denotes an image height (IMG HT) in millimeters.  FIG. 3  shows a curve T of a meridianal field curve of an incident light with a wavelength of 587.6000 NM and a curve S of a sagittal field curve of the incident light with the wavelength of 587.6000 NM. In  FIG. 4 , a horizontal axis denotes a distortion rate, and a vertical axis denotes an image height in millimeters. 
     In this embodiment, an overall image quality of the photographing lens system  100  may be greatly improved and an imaging range may be expanded. When an electronic zoom is performed, a better image quality and a better close-distance effect may be obtained. 
     In this embodiment, by increasing the focal power cooperation of the second lens group  12  and the first lens group  11 , a reverse difference on the surface of the lens with the inflection point in the first lens group  11  is reduced, so as to reduce the change of aberration such as the field curve and the drop of MTF in the process of focusing from the infinite distance to the closer distance. The decrease of the MTF drop refers to the decrease of the MTF change. In addition, in the process of focusing, the position of the second lens group  12  is slightly changed in cooperation with the first lens group  11 , so as to realize the lens having a high image quality and a low profile in cooperation with the image sensor of a large size. 
       FIG. 5  is a schematic view of the photographing lens system  100  according to another illustrative embodiment. In this embodiment, the first lens group  11  includes seven lenses, and the second lens group  12  includes one lens. 
     As illustrated in  FIG. 5 , in this embodiment, the first lens group  11  includes a first lens  111 , a third lens  113 , a fourth lens  114 , a fifth lens  115 , a sixth lens  116 , a seventh lens  117 , and a second lens  112  in sequence from an object side to an image side. The first lens  111  is an aspheric lens with a positive focal power. The third lens  113  has a negative focal power. The fourth lens  114  has a positive focal power. The fifth lens  115  has a positive focal power. The sixth lens  116  has a negative focal power. The seventh lens  117  has a positive focal power, and the second lens  112  is an aspheric lens with a negative focal power. 
     As illustrated in  FIG. 5 , in this embodiment, the second lens group  12  includes one eighth lens  121  with a negative focal power. 
     In this embodiment, in the process of focusing from the infinite distance to the closer distance, the first lens group  11  moves towards the object side along the optical axis  14 , and the second lens group  12  moves towards the image side. The air gap between the first lens group  11  and the second lens group  12  when focused at the closer distance is greater than the air gap between the first lens group  11  and the second lens group  12  when focused at the infinite distance. For example, the air gap between the first lens group  11  and the second lens group  12  may gradually increase, but is not limited to this. 
     It should be noted that, in other embodiments, when the focal length of the first lens group  11  and the focal length of the second lens group  12  both have the positive symbol and close to each other, each of the first lens group  11  and the second lens group  12  may move along the optical axis  14  in the process of focusing from the infinite distance to the closer distance, and the air gap between the first lens group  11  and the second lens group  12  may be reduced. 
     It should be noted that, in other embodiments, the number of the lenses in the first lens group  11  is not limited to seven provided in the embodiment of the present disclosure, and the number of the lenses in the second lens group  12  is not limited to one provided in the embodiment of the present disclosure. The number of the lenses in the first lens group  11  and the number of the lenses in the second lens group  12  may be set according to actual requirements. 
     In this embodiment, Fno is 2.3, and the focal length of the photographing lens system  100  is 7.9. The focal length f1 of the first lens group  11  is 7.76, and the focal length f2 of the second lens group  12  is −71.77. The value of f1/f is 0.98, the value of TTL/IH is 1.45, the value of fL1/F is 0.92, the value of d/f1 is 0.18, the value of |fL2/f2| is 0.18, the value of Vd1/Nd1 is 36.3, and the value of TTL/f is 1.31. 
     In this embodiment, the structural data of the photographing lens system  100  is illustrated in Table 5, the aspheric data is illustrated in Table 6, and the focal length data of each lens is illustrated in Table 7. The meanings of the letters in Tables 5 to 7 are the same with those in Tables 1 to 3, which will not be repeated herein. 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 5 
               
               
                   
               
               
                 Num 
                 R′ 
                 thi 
                 Nd 
                 Vd 
                 radius 
               
               
                   
               
             
            
               
                 1(STO) 
                 plane 
                 −0.38  
                   
                   
                   
               
               
                 2 
                 4.017 
                 0.71 
                 1.543 
                 56.0 
                 1.7 
               
               
                 3 
                 −260.907 
                 0.10 
               
               
                 4 
                 3.995 
                 0.37 
                 1.632 
                 24.0 
                 1.6 
               
               
                 5 
                 2.676 
                 0.58 
               
               
                 6 
                 −21.564 
                 0.67 
                 1.543 
                 56.0 
                 1.6 
               
               
                 7 
                 −6.571 
                 0.42 
               
               
                 8 
                 −6.278 
                 0.53 
                 1.543 
                 56.0 
                 1.9 
               
               
                 9 
                 −5.558 
                 0.92 
               
               
                 10 
                 −2.811 
                 0.32 
                 1.667 
                 19.2 
                 2.3 
               
               
                 11 
                 −4.383 
                 0.10 
               
               
                 12 
                 −3.035 
                 0.71 
                 1.543 
                 56.0 
                 3.0 
               
               
                 13 
                 −1.914 
                 0.10 
               
               
                 14 
                 5.793 
                 1.62 
                 1.534 
                 55.7 
                 5.0 
               
               
                 15 
                 2.827 
                 d15 
               
               
                 16 
                 56.319 
                 0.66 
                 1.582 
                 28.2 
                 5.5 
               
               
                 17 
                 24.020 
                 d17 
               
               
                 18 
                 plane 
                 0.21 
                 1.516 
                 64.2 
                 7.0 
               
               
                 19 
                 plane 
                 0.52 
               
               
                 20 
                 image plane 
                 — 
               
               
                   
               
            
           
         
       
     
     Tables 6 and 7 are illustrated in the next page. 
     In this embodiment, a spherical aberration curve diagram of the photographing lens system  100  is illustrated in  FIG. 6 , a diagram of astigmatic field curves is illustrated in  FIG. 7 , and a distortion curve diagram is illustrated in  FIG. 8 .  FIG. 6  shows a spherical aberration curve of an incident light with a wavelength of 656.3000 NM, a spherical aberration curve of an incident light with a wavelength of 587.6000 NM and a spherical aberration curve of an incident light with a wavelength of 486.0000 NM.  FIG. 7  shows a curve T of a meridianal field curve of an incident light with a wavelength of 587.6000 NM and a curve S of a sagittal field curve of the incident light with the wavelength of 587.6000 NM. 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 6 
               
               
                   
               
             
            
               
                 Num 
                 K 
                 A3 
                 A4 
                 A5 
                 A6 
               
               
                   
               
               
                 2 
                 2.87701E+00 
                   
                 −5.23091E−03 
                   
                 −1.05197E−03 
               
               
                 3 
                 −9.90000E+01  
                   
                 −2.74606E−03 
                   
                  2.51284E−03 
               
               
                 4 
                 3.35616E+00 
                   
                 −2.90811E−02 
                   
                  2.37167E−03 
               
               
                 5 
                 5.32709E−01 
                   
                 −2.72988E−02 
                   
                  1.45806E−03 
               
               
                 6 
                 −2.14589E+01  
                   
                 −4.80725E−03 
                   
                 −1.47926E−03 
               
               
                 7 
                 1.00801E+01 
                   
                 −8.79479E−03 
                   
                 −1.79078E−03 
               
               
                 8 
                 9.69174E+00 
                   
                 −1.69482E−02 
                   
                 −2.44443E−03 
               
               
                 9 
                 5.46142E+00 
                   
                 −1.06545E−02 
                   
                 −7.13091E−04 
               
               
                 10 
                 4.63385E−01 
                 −8.30563E−03 
                 −1.41825E−02 
                 1.73713E−03 
                  1.75452E−03 
               
               
                 11 
                 5.21495E−01 
                 −3.04138E−02 
                 −7.33205E−03 
                 2.90075E−03 
                  1.22035E−04 
               
               
                 12 
                 −6.23055E+00  
                 −3.57597E−02 
                  1.33114E−02 
                 9.10105E−04 
                 −1.49093E−03 
               
               
                 13 
                 −3.01904E+00  
                 −3.62900E−02 
                  6.23193E−03 
                 1.83743E−03 
                  5.64632E−04 
               
               
                 14 
                 −4.25468E−01  
                 −2.82706E−02 
                 −4.86635E−03 
                 5.66725E−04 
                  4.77496E−04 
               
               
                 15 
                 −9.77910E+00  
                  8.66230E−03 
                 −1.67742E−02 
                 4.48342E−03 
                 −2.79686E−04 
               
               
                 16 
                 9.89840E+01 
                   
                  2.23081E−03 
                   
                 −9.59427E−04 
               
               
                 17 
                 1.30507E+01 
                   
                  2.40594E−03 
                   
                 −7.01411E−04 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 Num 
                 A7 
                 A8 
                 A9 
                 A10 
                 A11 
                 A12 
               
               
                   
               
               
                 2 
                   
                 −1.56086E−04 
                   
                 −1.26665E−04 
                   
                  2.19747E−05 
               
               
                 3 
                   
                 −1.57028E−03 
                   
                  4.65873E−04 
                   
                 −7.04456E−05 
               
               
                 4 
                   
                 −5.34241E−04 
                   
                 −1.33231E−04 
                   
                 −1.49360E−05 
               
               
                 5 
                   
                 −3.42315E−04 
                   
                  2.98357E−05 
                   
                 −7.15916E−05 
               
               
                 6 
                   
                 −2.84356E−04 
                   
                 −2.14850E−04 
                   
                  5.83123E−05 
               
               
                 7 
                   
                 −7.62522E−05 
                   
                  1.24829E−06 
                   
                 −3.90302E−06 
               
               
                 8 
                   
                  3.00288E−04 
                   
                 −7.46501E−05 
                   
                  2.45202E−06 
               
               
                 9 
                   
                  4.48832E−05 
                   
                  1.89432E−06 
                   
                 −3.05072E−06 
               
               
                 10 
                  7.66744E−04 
                  5.44786E−04 
                  1.70488E−06 
                 −3.51191E−05 
                 −1.30757E−05 
                 −7.85470E−06 
               
               
                 11 
                 −4.65491E−06 
                  1.97563E−04 
                 −1.19738E−07 
                 −5.43103E−06 
                 −1.01722E−07 
                 −6.01375E−07 
               
               
                 12 
                 −9.30668E−05 
                  1.17748E−04 
                 −9.99156E−06 
                 −7.39774E−06 
                  8.94442E−07 
                  5.86190E−07 
               
               
                 13 
                  6.59490E−05 
                 −3.48032E−05 
                 −3.01553E−06 
                  3.15876E−07 
                 −2.98792E−07 
                 −7.28226E−08 
               
               
                 14 
                 −5.88952E−06 
                 −1.39099E−05 
                 −2.25137E−07 
                  6.18319E−08 
                 −7.93763E−09 
                  3.05891E−09 
               
               
                 15 
                 −5.34484E−05 
                 −1.08489E−06 
                  1.22616E−06 
                  1.19517E−07 
                 −3.83728E−09 
                 −2.53921E−09 
               
               
                 16 
                   
                  1.11669E−04 
                   
                 −7.76837E−06 
                   
                  3.29479E−07 
               
               
                 17 
                   
                  6.57665E−05 
                   
                 −3.68357E−06 
                   
                  1.27094E−07 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 Num 
                 A13 
                 A14 
                 A15 
                 A16 
                 A17 
                 A18 
               
               
                   
               
               
                 2 
                   
                 8.67256E−06 
                   
                 −4.50875E−06 
               
               
                 3 
                   
                 −2.15974E−06  
               
               
                 4 
                   
                 1.50722E−05 
                   
                 −5.43149E−06 
               
               
                 5 
                   
                 1.57653E−05 
                   
                 −2.81781E−06 
               
               
                 6 
                   
                 8.18336E−07 
                   
                 −5.05534E−06 
               
               
                 7 
                   
                 −5.75145E−06  
                   
                  2.05333E−06 
               
               
                 8 
                   
                 3.81935E−06 
                   
                  1.84439E−07 
               
               
                 9 
                   
                 8.32234E−07 
                   
                 −2.76327E−07 
               
               
                 10 
                 −7.26091E−07 
                 1.33882E−07 
                 2.05194E−07 
                  9.74222E−08 
                  1.67592E−08 
                 −6.25629E−09 
               
               
                 11 
                 −1.78579E−07 
                 −6.18653E−08  
                 −2.58232E−08  
                 −7.48980E−09 
                 −1.98869E−09 
                 −1.59361E−09 
               
               
                 12 
                  1.70718E−07 
                 4.22015E−08 
                 6.56232E−09 
                 −8.50845E−10 
                 −1.15212E−09 
                 −5.68398E−10 
               
               
                 13 
                 −5.21628E−09 
                 1.79655E−09 
                 1.18398E−09 
                  3.98583E−10 
                  3.93392E−11 
                 −2.84740E−11 
               
               
                 14 
                  1.24015E−10 
                 3.42979E−11 
                 1.23259E−11 
                 −3.14124E−13 
                 −1.49143E−13 
                 −6.72039E−14 
               
               
                 15 
                 −2.72444E−10 
                 5.55579E−12 
                 1.68426E−12 
                  1.81125E−12 
                  9.09552E−14 
                 −6.55456E−14 
               
               
                 16 
                   
                 −8.47157E−09  
                   
                  1.22099E−10 
                   
                 −7.58379E−13 
               
               
                 17 
                   
                 −2.68282E−09  
                   
                  3.20359E−11 
                   
                 −1.67137E−13 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
             
               
                 TABLE 7 
               
               
                   
               
               
                 Element 
                 Start surface 
                 Focal length 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
            
               
                 1 
                 2 
                 7.25 
               
               
                 2 
                 4 
                 −14.22 
               
               
                 3 
                 6 
                 17.05 
               
               
                 4 
                 8 
                 70.46 
               
               
                 5 
                 10 
                 −12.61 
               
               
                 6 
                 12 
                 7.76 
               
               
                 7 
                 14 
                 −12.71 
               
               
                 8 
                 16 
                 −71.77 
               
               
                   
               
            
           
         
       
     
     In this embodiment, when the distance of the object to be photographed is the infinite distance (INF) or the closer distance (100 mm), the data of d15 and d17 is illustrated in Table 8. 
     
       
         
           
               
               
               
             
               
                   
                 TABLE 8 
               
               
                   
                   
               
               
                   
                 infinite distance 
                 closer distance 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
            
               
                 distance of object to be photographed 
                 INF 
                 100 mm 
               
               
                 d15 
                 0.92 
                 2.31 
               
               
                 d17 
                 0.90 
                 0.22 
               
               
                   
               
            
           
         
       
     
     As can be seen from Table 8, d15 is 0.92 and d17 is 0.90 when the distance of the object to be photographed is the infinite distance (INF), and d15 is 2.31 and d17 is 0.22 when the distance of the object to be photographed is the closer distance (100 mm). 
     In this embodiment, an overall image quality of the photographing lens system  100  may be greatly improved and the imaging range may be expanded. When the electronic zoom is performed, a better image quality and a better close-distance effect may be obtained. 
       FIG. 9  is a schematic view of a photographing lens system  100  according to another illustrative embodiment. In this embodiment, the first lens group  11  includes seven lenses, and the second lens group  12  includes one lens. 
     As illustrated in  FIG. 9 , in this embodiment, the first lens group  11  includes a first lens  111 , a third lens  113 , a fourth lens  114 , a fifth lens  115 , a sixth lens  116 , a seventh lens  117 , and a second lens  112  in sequence from the object side to the image side. The first lens  111  is an aspheric lens with a positive focal power. The third lens  113  has a negative focal power. The fourth lens  114  has a positive focal power. The fifth lens  115  has a positive focal power. The sixth lens  116  has a negative focal power. The seventh lens  117  has a positive focal power, and the second lens  112  is an aspheric lens with a negative focal power. 
     As illustrated in  FIG. 9 , in this embodiment, the second lens group  12  includes one eighth lens  121  with a negative focal power. 
     In this embodiment, in the process of focusing from the infinite distance to the closer distance, the first lens group  11  moves towards the object side along the optical axis  14 , and the second lens group  12  moves towards the object side. The air gap between the first lens group  11  and the second lens group  12  when focused at the closer distance is greater than the air gap between the first lens group  11  and the second lens group  12  when focused at the infinite distance. That is, the air gap between the first lens group  11  and the second lens group  12  may be increased. 
     In this embodiment, Fno is 2.67, and the focal length of the photographing lens system  100  is 8.8. The focal length f1 of the first lens group  11  is 7.93, and the focal length f2 of the second lens group  12  is −15.46. The value of f1/f is 0.9, the value of TTL/IH is 1.45, the value of fL1/f is 0.85, the value of d/f1 is 0.01, the value of |fL2/f2| is 3.54, the value of Vd1/Nd1 is 36.2, and the value of TTL/f is 1.18. 
     In this embodiment, the structural data of the photographing lens system  100  is illustrated in Table 9, the aspheric data is illustrated in Table 10, and the focal length data of each lens is illustrated in Table 11. The meanings of the letters in Tables 9 to 11 are the same with those in Tables 1 to 3, which will not be repeated herein. 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 9 
               
               
                   
               
               
                 Num 
                 R′ 
                 thi 
                 Nd 
                 Vd 
                 radius 
               
               
                   
               
             
            
               
                 1(STO) 
                 plane 
                 −0.22  
                   
                   
                   
               
               
                 2 
                 4.799 
                 0.72 
                 1.544 
                 56.0 
                 1.7 
               
               
                 3 
                 −26.123 
                 0.10 
               
               
                 4 
                 4.493 
                 0.39 
                 1.671 
                 19.2 
                 1.5 
               
               
                 5 
                 3.126 
                 0.41 
               
               
                 6 
                 −181.853 
                 0.45 
                 1.544 
                 56.0 
                 1.6 
               
               
                 7 
                 −53.529 
                 0.48 
               
               
                 8 
                 −21.242 
                 0.80 
                 1.544 
                 56.0 
                 2.0 
               
               
                 9 
                 −7.882 
                 1.15 
               
               
                 10 
                 −2.507 
                 0.36 
                 1.650 
                 21.5 
                 2.4 
               
               
                 11 
                 −3.160 
                 0.10 
               
               
                 12 
                 −4.703 
                 0.52 
                 1.535 
                 55.7 
                 2.7 
               
               
                 13 
                 −3.216 
                 0.10 
               
               
                 14 
                 3.404 
                 0.97 
                 1.535 
                 55.7 
                 4.3 
               
               
                 15 
                 2.748 
                 d15 
               
               
                 16 
                 −23.450 
                 0.45 
                 1.535 
                 55.7 
                 5.6 
               
               
                 17 
                 12.951 
                 d17 
               
               
                 18 
                 plane 
                 0.21 
                 1.516 
                 64.2 
                 7.0 
               
               
                 19 
                 plane 
                 0.59 
               
               
                 20 
                 image plane 
                 — 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 10 
               
               
                   
               
             
            
               
                 Num 
                 Num 
                 K 
                 A3 
                 A4 
                 A5 
                 A6 
               
               
                   
               
               
                 2 
                 2* 
                 −3.41826E+00 
                   
                  1.08571E−05 
                   
                 −2.00232E−03 
               
               
                 3 
                 3* 
                  8.28845E+01 
                   
                 −4.10975E−03 
                   
                  6.89457E−04 
               
               
                 4 
                 4* 
                  1.46563E+00 
                   
                 −1.35651E−02 
                   
                  2.29377E−03 
               
               
                 5 
                 5* 
                  5.92109E−01 
                   
                 −1.69495E−02 
                   
                  9.99071E−04 
               
               
                 6 
                 6* 
                 −9.90000E+01 
                   
                 −7.70084E−03 
                   
                  1.54492E−03 
               
               
                 7 
                 7* 
                 −9.90000E+01 
                   
                 −1.51030E−02 
                   
                  2.52793E−03 
               
               
                 8 
                 8* 
                  4.43332E+01 
                   
                 −1.56814E−02 
                   
                 −7.52567E−05 
               
               
                 9 
                 9* 
                  1.09245E+01 
                   
                 −7.54304E−03 
                   
                 −6.55550E−04 
               
               
                 10 
                 10*  
                 −5.39636E−01 
                  1.73688E−03 
                  9.87087E−04 
                 7.39721E−05 
                 −2.64399E−05 
               
               
                 11 
                 11*  
                 −2.85144E+00 
                 −1.09450E−03 
                 −1.56582E−03 
                 2.44875E−04 
                 −1.65387E−05 
               
               
                 12 
                 12*  
                 −1.70566E+01 
                 −5.03351E−03 
                  1.52463E−03 
                 1.16790E−04 
                 −9.80556E−05 
               
               
                 13 
                 13*  
                 −8.04411E+00 
                 −1.39593E−02 
                  4.87713E−03 
                 1.90211E−04 
                 −6.68276E−05 
               
               
                 14 
                 14*  
                 −9.01395E−01 
                 −1.20529E−02 
                 −1.05934E−03 
                 7.59084E−05 
                  3.52576E−05 
               
               
                 15 
                 15*  
                 −6.16378E+00 
                  5.70900E−04 
                 −2.64516E−03 
                 4.49069E−04 
                 −2.13997E−05 
               
               
                 16 
                 16*  
                 −4.12094E+00 
                   
                  3.84593E−04 
                   
                 −7.89927E−05 
               
               
                 17 
                 17*  
                 −9.90000E+01 
                   
                 −1.85238E−03 
                   
                  3.85820E−05 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 Num 
                 A7 
                 A8 
                 A9 
                 A10 
                 A11 
                 A12 
               
               
                   
               
               
                 2 
                   
                 1.03590E−03 
                   
                 −7.80509E−04 
                   
                  2.22001E−04 
               
               
                 3 
                   
                 −1.29162E−03  
                   
                  3.09786E−04 
                   
                 −3.45373E−05 
               
               
                 4 
                   
                 −1.31978E−03  
                   
                  1.97775E−04 
                   
                  4.33935E−05 
               
               
                 5 
                   
                 −5.54112E−04  
                   
                 −4.81234E−05 
                   
                  2.33114E−06 
               
               
                 6 
                   
                 2.19555E−04 
                   
                 −5.87679E−05 
               
               
                 7 
                   
                 1.35139E−04 
                   
                  6.16736E−05 
               
               
                 8 
                   
                 4.90521E−04 
                   
                 −4.98120E−05 
                   
                 −4.10689E−06 
               
               
                 9 
                   
                 1.35813E−04 
                   
                 −5.41996E−06 
                   
                 −6.32175E−06 
               
               
                 10 
                 −9.06572E−06 
                 8.96198E−06 
                 −7.61759E−07 
                 −3.81447E−07 
                 −4.95989E−08 
                 −2.70815E−08 
               
               
                 11 
                 −4.75146E−06 
                 5.39559E−06 
                 −2.32207E−07 
                 −1.25670E−07 
                 −1.25252E−08 
                 −5.76537E−09 
               
               
                 12 
                 −7.61127E−06 
                 1.21454E−06 
                 −7.81405E−07 
                 −1.54809E−07 
                  1.53732E−08 
                  6.46723E−09 
               
               
                 13 
                 −1.70130E−05 
                 −2.76846E−06  
                 −6.38392E−09 
                  5.61265E−08 
                  8.89486E−09 
                  1.37884E−09 
               
               
                 14 
                 −3.90225E−07 
                 −4.35364E−07  
                  3.28847E−10 
                  1.20853E−09 
                 −7.41946E−11 
                  1.31866E−11 
               
               
                 15 
                 −2.46229E−06 
                 −2.07828E−08  
                  2.48197E−08 
                  1.56644E−09 
                  6.54944E−12 
                 −8.65850E−12 
               
               
                 16 
                   
                 5.63253E−07 
                   
                  4.12204E−08 
                   
                  2.45471E−10 
               
               
                 17 
                   
                 1.56673E−07 
                   
                 −1.92772E−08 
                   
                 −7.14445E−10 
               
               
                   
               
               
                 Num 
                 A13 
                 A14 
                 A15 
                 A16 
                 A17 
                 A18 
               
               
                   
               
               
                 2 
                   
                 −2.89583E−05  
               
               
                 3 
                   
                 −3.13416E−06  
               
               
                 4 
                   
                 −1.72635E−05  
                   
                  1.13791E−06 
               
               
                 5 
                   
                 9.82380E−06 
                   
                 −2.42597E−06 
               
               
                 6 
               
               
                 7 
               
               
                 8 
                   
                 2.72668E−06 
                   
                 −5.47275E−07 
               
               
                 9 
                   
                 5.21120E−07 
                   
                 −1.85515E−08 
               
               
                 10 
                  5.53894E−10 
                 5.93847E−10 
                  2.40932E−10 
                  5.40438E−11 
                 −2.70049E−12 
                 −5.09955E−12 
               
               
                 11 
                 −9.50498E−10 
                 −1.26469E−10  
                 −8.15120E−12 
                  7.73726E−12 
                  4.72308E−12 
                  1.39016E−12 
               
               
                 12 
                  8.23295E−10 
                 −7.72594E−11  
                 −7.50917E−11 
                 −2.06931E−11 
                 −2.33928E−12 
                  8.37928E−13 
               
               
                 13 
                  1.99441E−10 
                 1.83695E−11 
                 −6.71998E−13 
                 −5.91625E−13 
                 −1.85510E−13 
                 −4.56180E−14 
               
               
                 14 
                 −2.22622E−13 
                 9.62483E−15 
                  1.71640E−14 
                  9.75353E−16 
                  1.76304E−16 
                  2.04054E−17 
               
               
                 15 
                 −6.47675E−13 
                 5.21463E−14 
                  3.00945E−15 
                  1.23949E−15 
                  5.94842E−17 
                 −1.97177E−17 
               
               
                 16 
                   
                 −1.75498E−11  
               
               
                 17 
                   
                 1.80163E−11 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
             
               
                 TABLE 11 
               
               
                   
               
               
                 Element 
                 Start surface 
                 Focal length 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
            
               
                 1 
                 2 
                 7.51 
               
               
                 2 
                 4 
                 −17.30 
               
               
                 3 
                 6 
                 139.27 
               
               
                 4 
                 8 
                 22.56 
               
               
                 5 
                 10 
                 −23.79 
               
               
                 6 
                 12 
                 16.94 
               
               
                 7 
                 14 
                 −54.83 
               
               
                 8 
                 16 
                 −15.53 
               
               
                   
               
            
           
         
       
     
     In this embodiment, when the distance of the object to be photographed is the infinite distance (INF) or the closer distance (300 mm), the data of d15 and d17 is illustrated in Table 12. 
     
       
         
           
               
               
               
             
               
                   
                 TABLE 12 
               
               
                   
                   
               
               
                   
                 infinite distance 
                 closer distance 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
            
               
                 distance of object to be photographed 
                 INF 
                 300 mm 
               
               
                 d15 
                 1.72 
                 1.76 
               
               
                 d17 
                 0.85 
                 1.04 
               
               
                   
               
            
           
         
       
     
     As can be seen from Table 12, d15 is 1.72 and d17 is 0.85 when the distance of the object to be photographed is the infinite distance (INF), and d15 is 1.76 and d17 is 1.04 when the distance of the object to be photographed is the closer distance (300 mm). 
     In this embodiment, a spherical aberration curve diagram of the photographing lens system  100  is illustrated in  FIG. 10 , a diagram of astigmatic field curves is illustrated in  FIG. 11 , and a distortion curve diagram is illustrated in  FIG. 12 .  FIG. 10  shows a spherical aberration curve of an incident light with a wavelength of 656.3000 NM, a spherical aberration curve of an incident light with a wavelength of 587.6000 NM, and a spherical aberration curve of an incident light with a wavelength of 486.0000 NM.  FIG. 11  shows a curve T of a meridianal field curve of an incident light with a wavelength of 587.6000 NM and a curve S of a sagittal field curve of the incident light with the wavelength of 587.6000 NM. 
     In this embodiment, an overall image quality of the photographing lens system  100  may be greatly improved and the imaging range may be expanded. When the electronic zoom is performed, a better image quality and a better close-distance effect may be obtained. 
       FIG. 13  is a schematic view of a photographing lens system  100  according to another illustrative embodiment. In this embodiment, the first lens group  11  includes seven lenses, and the second lens group  12  includes one lens. 
     As illustrated in  FIG. 13 , in this embodiment, the first lens group  11  includes a first lens  111 , a third lens  113 , a fourth lens  114 , a fifth lens  115 , a sixth lens  116 , a seventh lens  117  and a second lens  112  in sequence from the object side to the image side. The first lens  111  is an aspheric lens with a positive focal power. The third lens  113  has a negative focal power. The fourth lens  114  has a positive focal power. The fifth lens  115  has a positive focal power. The sixth lens  116  has a negative focal power. The seventh lens  117  has a positive focal power, and the second lens  112  is an aspheric lens with a positive focal power. 
     As illustrated in  FIG. 13 , in this embodiment, the second lens group  12  includes one eighth lens  121  with a positive focal power. 
     In this embodiment, in the process of focusing from the infinite distance to the closer distance, the first lens group  11  moves towards the object side along the optical axis  14 , the position of the second lens group  12  is fixed, and the air gap between the first lens group  11  and the second lens group  12  gradually increases. 
     In this embodiment, Fno is 2.87, and the focal length of the photographing lens system  100  is 8.8. The focal length f1 of the first lens group  11  is 9.25, and the focal length f2 of the second lens group  12  is 73.95. The value of f1/f is 1.05, the value of TTL/IH is 1.73, the value of fL1/f is 1.11, the value of d/f1 is 0.03, the value of |fL2/f2| is 0.60, the value of Vd1/Nd1 is 35.8, and the value of TTL/f is 1.41. 
     In this embodiment, the structural data of the photographing lens system  100  is illustrated in Table 13, the aspheric data is illustrated in Table 14, and the focal length data of each lens is illustrated in Table 15. The meanings of the letters in Tables 13 to 15 are the same with those in Tables 1 to 3, which will not be repeated herein. 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 13 
               
               
                   
               
               
                 Num 
                 R′ 
                 thi 
                 Nd 
                 Vd 
                 radius 
               
               
                   
               
             
            
               
                 1(STO) 
                 plane 
                 −0.11  
                   
                   
                   
               
               
                 2 
                 8.268 
                 0.47 
                 1.623 
                 58.2 
                 1.5 
               
               
                 3 
                 −22.951 
                 0.10 
               
               
                 4 
                 4.424 
                 0.70 
                 1.650 
                 21.5 
                 1.6 
               
               
                 5 
                 3.072 
                 0.85 
               
               
                 6 
                 −2000.000 
                 0.37 
                 1.544 
                 56.0 
                 1.8 
               
               
                 7 
                 −41.001 
                 0.43 
               
               
                 8 
                 −93.161 
                 0.82 
                 1.544 
                 56.0 
                 2.2 
               
               
                 9 
                 −9.079 
                 1.05 
               
               
                 10 
                 −2.979 
                 0.38 
                 1.635 
                 24.0 
                 2.7 
               
               
                 11 
                 −7.244 
                 0.15 
               
               
                 12 
                 −4.584 
                 1.10 
                 1.768 
                 49.2 
                 3.1 
               
               
                 13 
                 −3.386 
                 0.10 
               
               
                 14 
                 3.223 
                 1.50 
                 1.535 
                 55.7 
                 5.3 
               
               
                 15 
                 3.120 
                 d15 
               
               
                 16 
                 19.811 
                 0.44 
                 1.535 
                 55.7 
                 6.1 
               
               
                 17 
                 39.207 
                 2.34 
               
               
                 18 
                 plane 
                 0.21 
                 1.516 
                 64.2 
                 7.0 
               
               
                 19 
                 plane 
                 0.56 
               
               
                 20 
                 image plane 
                 — 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 14 
               
               
                   
               
             
            
               
                 Num 
                 K 
                 A3 
                 A4 
                 A5 
                 A6 
               
               
                   
               
               
                 2 
                 −7.98364E+00 
                   
                 −1.03509E−05 
                   
                 −1.89234E−03  
               
               
                 3 
                 −6.13094E+00 
                   
                 −1.47257E−03 
                   
                 7.20029E−04 
               
               
                 4 
                  2.77647E+00 
                   
                 −1.16425E−02 
                   
                 2.10734E−03 
               
               
                 5 
                  9.75634E−01 
                   
                 −1.77280E−02 
                   
                 1.03884E−03 
               
               
                 6 
                  9.90000E+01 
                   
                 −9.18155E−03 
                   
                 1.29091E−03 
               
               
                 7 
                 −3.41775E+01 
                   
                 −1.70896E−02 
                   
                 2.13297E−03 
               
               
                 8 
                  9.90000E+01 
                   
                 −1.52202E−02 
                   
                 −8.14208E−05  
               
               
                 9 
                  8.97071E+00 
                   
                 −6.90825E−03 
                   
                 −5.60562E−04  
               
               
                 10 
                 −1.53349E−01 
                 −1.89798E−04 
                 −1.75534E−03 
                 −4.34986E−05  
                 5.12940E−05 
               
               
                 11 
                 −1.45471E+00 
                 −4.81388E−03 
                 −1.88477E−03 
                 2.63304E−04 
                 3.94634E−06 
               
               
                 12 
                 −1.10875E+01 
                 −5.48185E−03 
                  1.15694E−03 
                 8.08907E−05 
                 −8.37319E−05  
               
               
                 13 
                 −4.27088E+00 
                 −6.27663E−03 
                  3.83527E−04 
                 9.90436E−05 
                 1.96679E−05 
               
               
                 14 
                 −9.86406E−01 
                 −6.37374E−03 
                 −1.43800E−03 
                 3.12116E−05 
                 3.47055E−05 
               
               
                 15 
                 −4.74331E+00 
                  2.94706E−03 
                 −3.02671E−03 
                 4.65472E−04 
                 −1.72203E−05  
               
               
                 16 
                 −9.66057E+00 
                   
                  1.44448E−03 
                   
                 −8.39550E−05  
               
               
                 17 
                 −6.96237E+01 
                   
                  2.76468E−03 
                   
                 −1.49318E−04  
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 Num 
                 A7 
                 A8 
                 A9 
                 A10 
                 A11 
                 A12 
               
               
                   
               
               
                 2 
                   
                 1.14511E−03 
                   
                 −7.97234E−04 
                   
                  2.22275E−04 
               
               
                 3 
                   
                 −1.22220E−03  
                   
                  2.87797E−04 
                   
                 −3.55795E−05 
               
               
                 4 
                   
                 −1.32195E−03  
                   
                  2.04009E−04 
                   
                  4.15614E−05 
               
               
                 5 
                   
                 −5.46822E−04  
                   
                 −4.59474E−05 
                   
                  2.31112E−06 
               
               
                 6 
                   
                 1.86702E−04 
                   
                 −6.76655E−05 
               
               
                 7 
                   
                 2.84183E−04 
                   
                 −3.55354E−05 
               
               
                 8 
                   
                 4.54585E−04 
                   
                 −5.93743E−05 
                   
                 −4.84612E−06 
               
               
                 9 
                   
                 1.51413E−04 
                   
                 −4.49255E−06 
                   
                 −5.52018E−06 
               
               
                 10 
                  1.69615E−05 
                 1.43237E−05 
                  5.26502E−08 
                 −3.13449E−07 
                 −5.87416E−08 
                 −3.24114E−08 
               
               
                 11 
                 −6.66472E−07 
                 5.86648E−06 
                 −1.67602E−07 
                 −1.06656E−07 
                 −3.67590E−09 
                 −2.58888E−09 
               
               
                 12 
                  1.03502E−06 
                 4.25502E−06 
                 −2.44461E−07 
                 −1.29580E−07 
                 −1.04820E−09 
                  1.28832E−09 
               
               
                 13 
                  6.77534E−07 
                 −1.18896E−06  
                 −2.27772E−08 
                  1.54231E−08 
                 −6.35607E−10 
                 −1.86460E−10 
               
               
                 14 
                 −1.41711E−07 
                 −3.97436E−07  
                  4.03233E−09 
                  1.47772E−09 
                 −6.60079E−11 
                  1.21094E−11 
               
               
                 15 
                 −2.08527E−06 
                 −7.80335E−09  
                  2.28503E−08 
                  1.07608E−09 
                 −6.11846E−11 
                 −1.54885E−11 
               
               
                 16 
                   
                 −5.01994E−07  
                   
                  3.73503E−08 
                   
                  2.55942E−10 
               
               
                 17 
                   
                 1.73204E−06 
                   
                  1.13438E−08 
                   
                 −1.43770E−10 
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 Num 
                 A13 
                 A14 
                 A15 
                 A16 
                 A17 
                 A18 
               
               
                   
               
               
                 2 
                   
                 −2.71081E−05  
                   
                 0.00000E+00 
               
               
                 3 
                   
                 −7.71624E−07  
                   
                 0.00000E+00 
               
               
                 4 
                   
                 −1.99158E−05  
                   
                 2.00291E−06 
               
               
                 5 
                   
                 9.62554E−06 
                   
                 −2.26772E−06  
               
               
                 6 
               
               
                 7 
               
               
                 8 
                   
                 2.39087E−06 
                   
                 −2.01297E−07  
               
               
                 9 
                   
                 5.51610E−07 
                   
                 −1.01187E−08  
               
               
                 10 
                 −9.34787E−10 
                 3.22219E−10 
                 2.26872E−10 
                 6.19343E−11 
                 3.26649E−12 
                 −2.68147E−12 
               
               
                 11 
                 −1.62121E−10 
                 2.28023E−11 
                 5.99337E−12 
                 3.40331E−12 
                 1.03814E−12 
                 −2.13394E−13 
               
               
                 12 
                  2.26253E−10 
                 3.36201E−11 
                 2.42389E−12 
                 −4.80801E−13  
                 −1.70772E−13  
                 −2.05937E−14 
               
               
                 13 
                 −2.44602E−12 
                 3.51693E−12 
                 1.21497E−12 
                 2.46187E−13 
                 1.18966E−14 
                 −1.43724E−14 
               
               
                 14 
                 −6.63666E−13 
                 −4.29066E−14  
                 9.48667E−15 
                 −7.95358E−17  
                 2.32917E−17 
                 −5.56274E−18 
               
               
                 15 
                 −1.17015E−12 
                 2.64722E−14 
                 3.59846E−15 
                 1.57383E−15 
                 1.10172E−16 
                 −1.49659E−17 
               
               
                 16 
                   
                 −1.01008E−11  
               
               
                 17 
                   
                 −3.12316E−12  
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
             
               
                 TABLE 15 
               
               
                   
               
               
                 Element 
                 Start surface 
                 Focal length 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
            
               
                 1 
                 2 
                 9.78 
               
               
                 2 
                 4 
                 −19.22 
               
               
                 3 
                 6 
                 76.98 
               
               
                 4 
                 8 
                 18.35 
               
               
                 5 
                 10 
                 −8.18 
               
               
                 6 
                 12 
                 11.99 
               
               
                 7 
                 14 
                 44.42 
               
               
                 8 
                 16 
                 73.95 
               
               
                   
               
            
           
         
       
     
     In this embodiment, when the distance of the object to be photographed is the infinite distance (INF) or the closer distance (300 mm), the data of d15 is illustrated in Table 16. 
     
       
         
           
               
               
               
             
               
                   
                 TABLE 16 
               
               
                   
                   
               
               
                   
                 infinite distance 
                 closer distance 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
            
               
                 distance of object to be photographed 
                 INF 
                 300 mm 
               
               
                 d15 
                 0.81 
                 1.08 
               
               
                   
               
            
           
         
       
     
     It can be seen from Table 16 that d15 is 0.81 when the distance of the object to be photographed is the infinite distance (INF), and d15 is 1.08 when the distance of the object to be photographed is the closer distance (300 mm). 
     In this embodiment, a spherical aberration curve diagram of the photographing lens system  100  is illustrated in  FIG. 14 , a diagram of astigmatic field curves is illustrated in  FIG. 15 , and a distortion curve diagram is illustrated in  FIG. 16 .  FIG. 14  shows a spherical aberration curve of an incident light with a wavelength of 656.3000 NM, a spherical aberration curve of an incident light with a wavelength of 587.6000 NM and a spherical aberration curve of an incident light with a wavelength of 486.0000 NM.  FIG. 15  shows a curve T of a meridianal field curve of an incident light with a wavelength of 587.6000 NM and a curve S of a sagittal field curve of the incident light with the wavelength of 587.6000 NM. 
     In this embodiment, an overall image quality of the photographing lens system  100  may be greatly improved and the imaging range may be expanded. When the electronic zoom is performed, a better image quality and a better close-distance effect may be obtained. 
       FIG. 17  is a schematic view of a photographing lens system  100  according to another illustrative embodiment. In this embodiment, the first lens group  11  includes eight lenses, and the second lens group  12  includes one lens. 
     As illustrated in  FIG. 17 , in this embodiment, the first lens group  11  includes a first lens  111 , a third lens  113 , a fourth lens  114 , a fifth lens  115 , a sixth lens  116 , a seventh lens  117 , a ninth lens  118 , and a second lens  112  in sequence from the object side to the image side. The first lens  111  is an aspheric lens with a positive focal power. The third lens  113  has a negative focal power. The fourth lens  114  has a positive focal power. The fifth lens  115  has a negative focal power. The sixth lens  116  has a negative focal power. The seventh lens  117  has a negative focal power, the ninth lens  118  has a positive focal power, and the second lens  112  is an aspheric lens with a positive focal power. 
     In this embodiment, the ninth lens  118  includes a twentieth surface  1181  facing the object side and a twenty-first surface  1182  facing the image side. 
     As illustrated in  FIG. 17 , in this embodiment, the second lens group  12  includes one eighth lens  121  with a positive focal power. 
     In this embodiment, in the process of focusing from the infinite distance to the closer distance, the first lens group  11  moves towards the object side along the optical axis  14 , the second lens group  12  moves towards the image side, and the air gap between the first lens group  11  and the second lens group  12  gradually increases. 
     In this embodiment, Fno is 2.08, and the focal length of the photographing lens system  100  is 9.0. The focal length f1 of the first lens group  11  is 9.29, and the focal length f2 of the second lens group  12  is 196.88. The value of f1/f is 1.03, the value of TTL/IH is 1.46, the value of fL1/F is 0.80, the value of d/f1 is 0.14, the value of |fL2/f2| is 0.17, the value of Vd1/Nd1 is 36.3, and the value of TTL/f is 1.16. 
     In this embodiment, the structural data of the photographing lens system  100  is illustrated in Table 17, the aspheric data is illustrated in Table 18, and the focal length data of each lens is illustrated in Table 19. 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 17 
               
               
                   
               
               
                 Num 
                 R′ 
                 thi 
                 Nd 
                 Vd 
                 radius 
               
               
                   
               
             
            
               
                 1(STO) 
                 plane 
                 −0.78  
                   
                   
                   
               
               
                 2 
                 3.337 
                 1.02 
                 1.542 
                 56.0 
                 2.2 
               
               
                 3 
                 20.336 
                 0.10 
               
               
                 4 
                 4.342 
                 0.31 
                 1.667 
                 19.2 
                 2.0 
               
               
                 5 
                 3.101 
                 0.38 
               
               
                 6 
                 11.900 
                 0.46 
                 1.542 
                 56.0 
                 1.8 
               
               
                 7 
                 18.098 
                 0.66 
               
               
                 8 
                 52.452 
                 0.39 
                 1.542 
                 56.0 
                 1.8 
               
               
                 9 
                 15.360 
                 0.41 
               
               
                 10 
                 −11.280 
                 0.35 
                 1.667 
                 19.2 
                 2.1 
               
               
                 11 
                 −16.821 
                 0.52 
               
               
                 12 
                 −5.321 
                 0.54 
                 1.566 
                 37.4 
                 2.7 
               
               
                 13 
                 −9.880 
                 0.10 
               
               
                 14 
                 5.169 
                 0.62 
                 1.534 
                 55.7 
                 3.9 
               
               
                 15 
                 9.173 
                 0.19 
               
               
                 16 
                 1.988 
                 0.85 
                 1.534 
                 55.7 
                 4.7 
               
               
                 17 
                 1.904 
                 d17 
               
               
                 18 
                 9.951 
                 0.56 
                 1.534 
                 55.7 
                 6.5 
               
               
                 19 
                 10.770 
                 d19 
               
               
                 20 
                 plane 
                 0.21 
                 1.516 
                 64.2 
                 7.0 
               
               
                 21 
                 plane 
                 0.50 
               
               
                 22 
                 image plane 
                 — 
               
               
                   
               
            
           
         
       
     
     In Table 17, similar to the above embodiments, in this embodiment, surface one is the seventeenth surface of the aperture diaphragm (STO), surface two is the first surface  1111  of the first lens  111 , surface three is the second surface  1112  of the first lens  111 , surface four is the third surface  1131  of the third lens  113 , surface five is the fourth surface  1132  of the third lens  113 , surface six is the fifth surface  1141  of the fourth lens  114 , surface seven is the sixth surface  1142  of the fourth lens  114 , surface eight is the seventh surface  1151  of the fifth lens  115 , surface nine is the eighth surface  1152  of the fifth lens  115 , surface ten is the ninth surface  1161  of the sixth lens  116 , surface eleven is the tenth surface  1162  of the sixth lens  116 , surface twelve is the eleventh surface  1171  of the seventh lens  117 , and surface thirteen is the twelfth surface  1172  of the seventh lens  117 . 
     Different from the above embodiments, in this embodiment, surface fourteen is the twentieth surface  1181  of the ninth lens  118 , surface fifteen is the twenty-first surface  1182  of the ninth lens  118 , surface sixteen is the thirteenth surface  1121  of the second lens  112 , surface seventeen is the fourteenth surface  1122  of the second lens  112 , surface eighteen is the fifteenth surface  1211  of the eighth lens  121 , surface nineteen is the sixteenth surface  1212  of the eighth lens  121 , surface twenty is the eighteenth surface  151  of the filter element  15  facing the object side, surface twenty one is the nineteenth surface  152  of the filter element  15  facing the image side, and surface twenty two is the image plane  131 . 
     In this embodiment, d17 is the air gap between the surface seventeen and the surface eighteen, that is, the air gap between the first lens group  11  and the second lens group  12 , and d19 is the air gap between the surface nineteen and the surface twenty, that is, the air gap between the second lens group  12  and the eighteenth surface  151 . 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 18 
               
               
                   
               
             
            
               
                 Num 
                 K 
                 A4 
                 A6 
                 A8 
                 A10 
               
               
                   
               
               
                 2 
                  0.00000E+00 
                 −4.84795E−04 
                 7.76784E−04 
                 −4.36387E−04 
                 6.66534E−05 
               
               
                 3 
                  0.00000E+00 
                 −4.05878E−03 
                 9.92681E−03 
                 −1.18239E−02 
                 7.37601E−03 
               
               
                 4 
                 −7.18470E−01 
                 −1.56462E−02 
                 1.79159E−02 
                 −2.39364E−02 
                 1.75604E−02 
               
               
                 5 
                 −1.30232E−01 
                 −1.29811E−02 
                 9.39117E−03 
                 −1.26321E−02 
                 8.55054E−03 
               
               
                 6 
                  2.66027E+00 
                 −2.21035E−04 
                 1.48396E−03 
                  6.18120E−03 
                 −1.31633E−02  
               
               
                 7 
                 −2.71262E+01 
                 −6.78585E−03 
                 4.73205E−03 
                 −4.80027E−03 
                 3.08224E−03 
               
               
                 8 
                 −79.3152 
                 −0.03703835 
                 0.008753212 
                 −0.01113056 
                 0.009595714 
               
               
                 9 
                 −7.124521036 
                 −0.035654504 
                 −0.015199937 
                 0.089091664 
                 −0.197584055 
               
               
                 10 
                 −0.078361236 
                 −0.049773889 
                 0.009323083 
                 0.052006425 
                 −0.150821916 
               
               
                 11 
                 13.79313 
                 −0.05633645 
                 0.05335295 
                 −0.04373659 
                 0.02300393 
               
               
                 12 
                 −0.521545626 
                 −0.077830663 
                 0.13446567 
                 −0.136771427 
                 0.100362169 
               
               
                 13 
                 −3.351622711 
                 −0.127242682 
                 0.134266441 
                 −0.121157308 
                 0.078583129 
               
               
                 14 
                 −12.48757834 
                 0.046052448 
                 −0.038936432 
                 0.017398254 
                 −0.005846171 
               
               
                 15 
                 0.034266185 
                 0.025037611 
                 −0.009693793 
                 0.000242749 
                 0.000472076 
               
               
                 16 
                 −0.995734756 
                 −0.151309084 
                 0.051990462 
                 −0.012849667 
                 0.002211922 
               
               
                 17 
                 −1.011493196 
                 −0.114255013 
                 0.03751601 
                 −0.009767382 
                 0.001837667 
               
               
                 18 
                 −5.804001 
                 0.000137489 
                 6.03883E−06 
                 −2.43512E−06 
                 1.67339E−07 
               
               
                 19 
                 −2.064018 
                 −0.000175238 
                 −8.14403E−06  
                  2.25456E−07 
                 −2.74232E−08  
               
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 Num 
                 A10 
                 A12 
                 A14 
                 A16 
                 A18 
                 A20 
               
               
                   
               
               
                 2 
                 6.66534E−05 
                  1.45108E−05 
                 −7.89128E−06  
                  1.31692E−06 
                 −1.14492E−07  
                 5.62353E−09 
               
               
                 3 
                 7.37601E−03 
                 −2.62648E−03 
                 5.33414E−04 
                 −5.50932E−05 
                 1.63304E−06 
                 9.31910E−08 
               
               
                 4 
                 1.75604E−02 
                 −7.68868E−03 
                 2.09970E−03 
                 −3.50785E−04 
                 3.26720E−05 
                 −1.28660E−06  
               
               
                 5 
                 8.55054E−03 
                 −3.20501E−03 
                 6.70559E−04 
                 −6.98788E−05 
                 2.48433E−06 
                 2.86214E−08 
               
               
                 6 
                 −1.31633E−02  
                  1.21483E−02 
                 −6.25393E−03  
                  1.85511E−03 
                 −2.95240E−04  
                 1.95669E−05 
               
               
                 7 
                 3.08224E−03 
                 −1.23098E−03 
                 2.41126E−04 
                 −2.80981E−06 
                 −6.15428E−06  
                 6.90220E−07 
               
               
                 8 
                 0.009595714 
                 −0.00593126 
                 0.00227514 
                 −0.000527927 
                 6.84987E−05 
                 −3.68519E−06  
               
               
                 9 
                 −0.197584055 
                 0.259075667 
                 −0.214208764 
                 0.109172875 
                 −0.028627679 
                 −0.001237299 
               
               
                 10 
                 −0.150821916 
                 0.220744163 
                 −0.203870042 
                 0.124624357 
                 −0.050257461 
                  0.012682014 
               
               
                 11 
                 0.02300393 
                 −0.007918624 
                 0.00178701 
                 −0.000253215 
                 2.02799E−05 
                 −6.96244E−07  
               
               
                 12 
                 0.100362169 
                 −0.053225191 
                 0.019874843 
                 −0.005032296 
                 0.000785729 
                 −4.70392E−05  
               
               
                 13 
                 0.078583129 
                 −0.034107832 
                 0.009653069 
                 −0.001684895 
                 0.00014261 
                 6.28504E−06 
               
               
                 14 
                 −0.005846171 
                 0.001417181 
                 −0.000241884 
                  2.90821E−05 
                 −2.47065E−06 
                 1.47544E−07 
               
               
                 15 
                 0.000472076 
                 −0.000145385 
                 2.23817E−05 
                 −1.77059E−06 
                 1.92874E−08 
                 1.03941E−08 
               
               
                 16 
                 0.002211922 
                 −0.000260496 
                 2.08759E−05 
                 −1.12032E−06 
                 3.80238E−08 
                 −6.50329E−10  
               
               
                 17 
                 0.001837667 
                 −0.000239186 
                 2.11435E−05 
                 −1.23852E−06 
                 4.47097E−08 
                 −7.21771E−10  
               
               
                 18 
                 1.67339E−07 
                 −6.02643E−09 
                 1.39659E−10 
                 −2.3448E−12 
                 2.62414E−14 
                 −1.4194E−16 
               
               
                 19 
                 −2.74232E−08  
                  1.86805E−09 
                 −5.58414E−11  
                  8.24741E−13 
                 −7.29453E−15  
                 3.91128E−17 
               
               
                   
               
               
                 Num 
                 A20 
                 A22 
                 A24 
                 A26 
                 A28 
                 A30 
               
               
                   
               
               
                 2 
                 5.62353E−09 
               
               
                 3 
                 9.31910E−08 
               
               
                 4 
                 −1.28660E−06  
               
               
                 5 
                 2.86214E−08 
               
               
                 6 
                 1.95669E−05 
               
               
                 7 
                 6.90220E−07 
               
               
                 8 
                 −3.68519E−06  
               
               
                 9 
                 −0.001237299 
                 0.003858319 
                 −0.00142647 
                 0.000267945 
                 −2.66553E−05  
                  1.11691E−06 
               
               
                 10 
                  0.012682014 
                 −0.00162836 
                 −3.64144E−05  
                  4.65192E−05 
                 −6.42601E−06  
                  3.07467E−07 
               
               
                 11 
                 −6.96244E−07  
               
               
                 12 
                 −4.70392E−05  
                 −8.42115E−06 
                 2.37031E−06 
                 −2.63237E−07 
                 1.49066E−08 
                 −3.53486E−10 
               
               
                 13 
                 6.28504E−06 
                 −3.24355E−06 
                 4.03894E−07 
                 −2.64832E−08 
                 9.29299E−10 
                 −1.37995E−11 
               
               
                 14 
                 1.47544E−07 
                 −6.06702E−09 
                 1.63846E−10 
                 −2.62362E−12 
                 1.90683E−14 
                 −4.56068E−18 
               
               
                 15 
                 1.03941E−08 
                 −1.11176E−09 
                 5.81867E−11 
                 −1.74139E−12 
                 2.85146E−14 
                 −1.98931E−16 
               
               
                 16 
                 −6.50329E−10  
                 −3.94532E−12 
                 4.83109E−13 
                 −1.11289E−14 
                 1.20151E−16 
                 −5.24941E−19 
               
               
                 17 
                 −7.21771E−10  
                 −1.29752E−11 
                 9.85884E−13 
                 −2.32596E−14 
                 2.67239E−16 
                 −1.25523E−18 
               
               
                 18 
                 −1.4194E−16 
               
               
                 19 
                 3.91128E−17 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
             
               
                 TABLE 19 
               
               
                   
               
               
                 Element 
                 Start surface 
                 Focal length 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
            
               
                 1 
                 2 
                 7.17 
               
               
                 2 
                 4 
                 −17.87 
               
               
                 3 
                 6 
                 62.09 
               
               
                 4 
                 8 
                 −39.98 
               
               
                 5 
                 10 
                 −51.92 
               
               
                 6 
                 12 
                 −21.14 
               
               
                 7 
                 14 
                 20.94 
               
               
                 8 
                 16 
                 33.05 
               
               
                 9 
                 18 
                 196.88 
               
               
                   
               
            
           
         
       
     
     In this embodiment, when the distance of the object to be photographed is the infinite distance (INF) or the closer distance (100 mm), the data of d17 and d19 is illustrated in Table 20. 
     
       
         
           
               
               
               
             
               
                   
                 TABLE 20 
               
               
                   
                   
               
               
                   
                 infinite distance 
                 closer distance 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
            
               
                 distance of object to be photographed 
                 INF 
                 100 mm 
               
               
                 d17 
                 0.56 
                 1.83 
               
               
                 d19 
                 1.70 
                 1.50 
               
               
                   
               
            
           
         
       
     
     As can be seen from Table 20, d17 is 0.56 and d19 is 1.70 when the distance of the object to be photographed is the infinite distance (INF), and d17 is 1.83 and d19 is 1.50 when the distance of the object to be photographed is the closer distance (100 mm). 
     In this embodiment, a spherical aberration curve diagram of the photographing lens system  100  is illustrated in  FIG. 18 , a diagram of astigmatic field curves is illustrated in  FIG. 19 , and a distortion curve diagram is illustrated in  FIG. 20 .  FIG. 18  shows a spherical aberration curve of an incident light with a wavelength of 656.3000 NM, a spherical aberration curve of an incident light with a wavelength of 587.6000 NM and a spherical aberration curve of an incident light with a wavelength of 486.0000 NM.  FIG. 19  shows a curve T of a meridianal field curve of an incident light with a wavelength of 587.6000 NM and a curve S of a sagittal field curve of the incident light with the wavelength of 587.6000 NM. 
     In this embodiment, an overall image quality of the photographing lens system  100  may be greatly improved and the imaging range may be expanded. When the electronic zoom is performed, a better image quality and a better close-distance effect may be obtained. 
     The photographing lens system provided by the embodiments of the present disclosure has been described above in detail. The following is a brief introduction to a photographing device and an electronic apparatus provided by the embodiments of the present disclosure. 
     As illustrated in  FIG. 1 ,  FIG. 5 ,  FIG. 9 ,  FIG. 13  and  FIG. 17 , an illustrative embodiment of the present disclosure also provides a photographing device, including an image sensor  13  and the photographing lens system  100  described in any of the above embodiments. The image sensor  13  is located at the image plane  131  of the photographing lens system  100 , and a surface of the image sensor  13  facing the object side is located at the image plane  131 . 
     In this embodiment, the photographing lens system includes the first lens group and the second lens group in sequence from the object side to the image side, and the first lens group includes N lenses. In the direction from the object side to the image side, the lens one in the first lens group is the first lens, and the lens N in the first lens group is the second lens. The first lens is a lens with a positive focal power, and the surface of the first lens facing the object side is a convex surface. The second lens is a lens with a focal power, and the second lens group includes at least one lens with a focal power. That is, the focal power of the second lens is not zero, and may be positive or negative, and also the focal power of the at least one lens of the second lens group is not zero, and may be positive or negative. Therefore, through the cooperation of the first lens group and the second lens group, the photographing lens system allows an aberration change caused by the first lens group and an aberration change caused by the second lens group to be compensated with each other, in the process of focusing between the infinite distance and the closer distance, so as to maintain a good image resolution ability in the process of focusing between the infinite distance and the closer distance. Moreover, the focal length of the first lens group and the focal length of the photographing lens system satisfy the relationship of f1/f of 0.5&lt;f1/f&lt;1.5. Thus, the balance between the total track length (TTL) and the optical performance may be ensured. 
     An illustrative embodiment of the present disclosure also provides an electronic apparatus. The electronic apparatus includes an apparatus body and the photographing device according to any of the above embodiments, and the photographing device is mounted to the apparatus body. 
     In this embodiment, the electronic apparatus may be, but is not limited to, a three-dimensional image capturing device, a digital camera, a mobile terminal, a digital tablet, an intelligent TV, a network monitoring device, a somatosensory game console, a dash cam, a backup camera, a wearable device or an aerial camera. 
     In this embodiment, the photographing lens system includes the first lens group and the second lens group in sequence from the object side to the image side, and the first lens group includes N lenses. In the direction from the object side to the image side, the lens one in the first lens group is the first lens, and the lens N in the first lens group is the second lens. The first lens is a lens with a positive focal power, and the surface of the first lens facing the object side is a convex surface. The second lens is a lens with a focal power, and the second lens group includes at least one lens with a focal power. Therefore, through the cooperation of the first lens group and the second lens group, the photographing lens system allows an aberration change caused by the first lens group and an aberration change caused by the second lens group to be compensated with each other, in the process of focusing between the infinite distance and the closer distance, so as to maintain a good image resolution ability in the process of focusing between the infinite distance and the closer distance. Moreover, the focal length of the first lens group and the focal length of the photographing lens system satisfy the relationship of f1/f of 0.5&lt;f1/f&lt;1.5. Thus, the balance between the total track length (TTL) and the optical performance may be ensured. 
     Other embodiments of the present disclosure will be apparent to those skilled in the art after consideration of the specification and practice of the present disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure following the general principles of the present disclosure and including such known or customary practice in the art, which is not described in the present disclosure. It is intended that the specification and examples be considered as illustrative only, with a true scope and spirit of the present disclosure being indicated by the following claims. 
     It will be appreciated that the present disclosure is not limited to the exact construction that has been described above and illustrated in the accompanying drawings, and that various modifications and changes may be made without departing from the scope thereof. It is intended that the scope of the present disclosure only be limited by the appended claims.