Patent ID: 7764442

Claim:
An image taking lens comprising: a stop, a first lens having a positive power and biconvex configuration, a second lens having a negative power and having a meniscus configuration in which a convex surface is disposed to face an object, a third lens having a positive power and a meniscus configuration in which a convex surface is disposed to face an image, and a fourth lens having a negative power and a meniscus configuration in which a convex surface is disposed to face the object, which are arranged in this order from the object, and satisfying the following formulae (1) to (4) and (13), 3.00< F 1/ d 1<10.00 (1) −20.0< F 2/ d 3≦−11.83 (2-A) 50.0<ν1<60.0 (3) 20.0<ν2<30.0 (4) 2.80< F 3/ d 5<5.20 (13) hereupon, F 1 : focal length of the first lens; F 2 : focal length of the second lens; F 3 : focal length of the third lens; d 1 : a center thickness of the first lens; d 3 : a center thickness of the second lens; d 5 : a center thickness of the third lens; ν 1 : an Abbe's number of the first lens; and ν 2 : an Abbe's number of the second lens.