Patent ID: 8705182

Claim:
A photographing lens assembly comprising, in order from an object side to an image side: a first lens element with positive refractive power having an object de surface being convex at a paraxial region thereof; second lens element with negative refractive power; a third lens element with refractive power; a fourth lens element with positive refractive power having an object-side surface being concave at a paraxial region thereof and an image-side surface being convex at a paraxial region thereof; and a fifth lens element with negative refractive power having an image-side surface being concave at a paraxial region thereof and being convex at a peripheral region thereof, wherein the fifth lens element is made of plastic material and has at least one of an object-side surface and the image-side surface being aspheric; wherein an axial distance between the fourth lens element and the fifth lens element is T45, a central thickness of the fourth lens element is CT4, a central thickness of the fifth lens element is CT5, a focal length of the photographing lens assembly is f, a curvature radius of an image-side surface of the second lens element is R4, an axial distance between the first lens element and the second lens element is T12, an axial distance between the second lens element and the third lens element is T23, and the following relationships are satisfied: 1.0 <T 45 /CT 4<2.5: 1.0 <T 45 /CT 5<5.0; −2.0 <f/R 4<0.40; and 0 <T 12/ T 23<0.65.