Patent ID: 7450320
Filing Date: 2008-11-11
Classification: G02B

Abstract:
1. A zoom lens, comprising: a first lens group, having a negative refractive power and comprising a first lens with a negative refractive power, wherein the first lens is a meniscus lens with a convex surface facing an object side and an Abbe number greater than 50; and a second lens group, having a positive refractive power, disposed between the first lens group and an image side, wherein the first lens group and the second lens group are suitable for moving between the object side and the image side, wherein a focal length of the zoom lens is F, a focal length of the first lens group is F1, a curvature radius of a surface facing the second lens group of the first lens is R2, and −0.6<F/F1<−0.2, 0.7<R2/F<1.8.