Patent ID: 7359127

Claim:
An imaging lens, comprising: in order from an object side towards an image surface side, a first lens which is a biconvex lens, a diaphragm, a second lens which is a meniscus lens having a negative power whose convex surface faces the image surface side, and a third lens which is a meniscus lens having a positive power whose convex surface faces the object side, wherein conditions expressed by each of following expressions (1) to (3) are to be satisfied: 0.7≦ f 1 /fl≦ 1 (1) −6≦ f 2 /fl≦− 2.8 (2) 3 ≦f 3 /fl≦ 10 (3) 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 f 3 : focal distance of the third lens.