主权项 |
1. An imaging lens, consisting of:
a front group which consists of a negative first lens having a meniscus shape with a convex surface toward the object side, a negative second lens, a point along the optical axis at the image-side surface of which is more toward the object side than points on both ends of the effective diameter of the image-side surface, and a positive third lens; an aperture stop; and a rear group which is positive as a whole in this order from the object side, wherein the rear group consists of one positive lens and one negative lens; and conditional formula (1) below is satisfied:
0.25<2*f*tan(ω/2)/L<1.00 (1), where f: the focal length of the entire system ω: a half angle of view L: the distance from the object-side surface of the first lens to the imaging plane along the optical axis (back focus corresponds to an air converted length), and the conditional formula (2) below is satisfied:
−2.0<f2/f<−0.5 (2), where f2: the focal length of the second lens, and f: the focal length of the entire system. |