Patent ID: 7808726

Claim:
An image capture lens comprising: when focus is changed from infinity focusing to close focusing, a first lens group moving from an image surface side to an object side and having positive refractive power; and a second lens group fixed relatively to the image surface and having negative refractive power, wherein the first lens group includes a negative first lens having a strong concave surface facing to the image side at a nearest side to the object, the second lens group includes one negative lens having a strong concave surface facing to the image side or a negative cemented lens including a positive lens and a negative lens, and the image capture lens satisfies conditional expressions (1), (2), and (3); 0.7< f 1/ fi< 0.9 (1) 1.0< bf/fi< 1.4 (2) 0.5< Rf 2/ Rr 2<1 (3) where fi is a focal length of the overall lens system, f1 is a focal length of the first lens group, bf is a back focus of the overall lens system, Rf2 is a radius of curvature of the image side surface of the lens disposed at the nearest side to the object of the first lens group, and Rr2 is a radius of curvature of the surface nearest to the image side of the second lens group.