Patent ID: 8355213

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; a second lens element with negative refractive power, the object-side and image-side surfaces thereof being aspheric; a third lens element having 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 first 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 f 1 , a focal length of the second lens element is f 2 , a radius of curvature of the object-side surface of the first lens element is R 1 , an Abbe number of the first lens element is V 1 , an Abbe number of the second lens element is V 2 , and they satisfy the relations: 1.28<f/f 1 <2.0, 23.0<(R 1 / f )*100<33.0, 30.5<V 1 −V 2 <46.0, −0.65<f/f 2 <−0.25.