Patent ID: 8169528
Filing Date: 2012-05-01
Classification: G02B

Abstract:
1. A photographing lens assembly 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 second lens element with negative refractive power having a concave object-side surface and a concave image-side surface; a third lens element with negative refractive power, the object-side and image-side surfaces thereof being aspheric; a fourth lens element with negative refractive power having a concave image-side surface on which at least one inflection point is formed; and an aperture stop disposed between an imaged object and the second lens element; wherein there are four lens elements with refractive power; and wherein a distance near the optical axis between the first and second lens elements is T12, a focal length of the photographing lens assembly is f, an Abbe number of the first lens element is V1, an Abbe number of the second lens element is V2, a focal length of the third lens element is f3, and they satisfy the relations: 0.50<(T12/f)*100<10.00, 30.5<V1−V2<42.0, −60.0<(f/f3)*100<−0.5.