Patent ID: 8456765

Claim:
A wide-conversion lens, in order from the object-side to the image-side thereof, comprising: a first lens with negative refraction power, and comprising a surface facing the object side; a second lens with negative refraction power; a third lens with positive refraction power; a fourth lens with positive refraction power; a fifth lens with negative refraction power; wherein the wide-conversion lens satisfies the following conditions: R 1<0; (1) V d 2 −V d1 ≧19; (2) V d2 −V d3 ≧35; (3) wherein, R1 is the curvature radius of the surface of the first lens; V d1 is the Abbe number of the first lens; V d2 is the Abbe number of the second lens; V d3 is the Abbe number of the third lens.