Patent ID: 8094386

Claim:
An imaging lens used for forming an image of an object on an image-taking surface of a solid image pickup element, consisting of: in order from an object side to an image surface side, a diaphragm, a first lens that is a meniscus lens having a positive power whose convex surface faces the object side, and a second lens that is a lens having a negative power whose concave surface faces the object side, wherein a condition expressed by the following expression (1) is to be satisfied: 0.05 ≦r 1 /r 2 ≦0.29 (1) where, r 1 : center radius curvature of the object side face of the first lens and r 2 : center radius curvature of the image surface side face of the first lens; and wherein, further, a condition expressed by a following expression (2) is to be satisfied: 0.4 ≦r 1 /FL≦ 0.5 (2) where, FL: focal distance of the entire lens system.