Patent ID: 7450323

Claim:
An imaging lens used for forming an image of an object on an image-taking surface of an image sensor element, comprising: in order from an object side to an image surface side, a first lens that is a meniscus lens having a positive power whose convex surface faces the object side, a diaphragm, a second lens that is a meniscus lens having a negative power whose convex surface faces the image surface side, and a third lens that is a meniscus lens having a negative power whose convex surface faces the object side, wherein conditions expressed by the following expressions (1) and (2) are to be satisfied: −130 ≦f 2 /fl≦− 6 (1) 0.8 ≦f 1 /fl≦ 1 (2) where, fl: focal distance of the entire lens system f 1 : focal distance of the first lens f 2 : focal distance of the second lens.