Patent ID: 8576500

Claim:
A photographing lens system comprising, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface and a convex image-side surface; a plastic second lens element with negative refractive power having a concave object-side surface and a convex image-side surface, the object-side and image-side surfaces thereof being aspheric; a plastic third lens element having a convex object-side surface and a concave image-side surface, the object-side and image-side surfaces thereof being aspheric and at least one of which being provided with at least one inflection point; and an aperture stop disposed between an imaged object and the second lens element; wherein there are three lens elements with refractive power; and wherein a focal length of the photographing lens system is f, a focal length of the first lens element is f1, an Abbe number of the first lens element is V1, an Abbe number of the second lens element is V2, an on-axis thickness of the second lens element is CT2, and they satisfy the relations: 1.28<f/f1<2.0, 30.5<V1−V2<46.0, 2.0<(CT2/f)*100<12.0, 0.10 [mm]<CT2<0.38 [mm].