Patent ID: 9612426
Date: 2017-04-04
CPC Classifications: G02B

Claim:
1. An imaging lens consisting of: a front group having positive refractive power as a whole; and a rear group in this order from an object side, wherein the front group consists of two or three positive lenses, a negative lens with its concave surface facing an image side, a positive lens with its convex surface facing the object side, a negative lens with its concave surface facing the image side, a stop, a negative lens with its concave surface facing the object side and a plurality of positive lenses in this order from the object side, wherein the front group satisfies the following conditional expression: f: a focal length of an entire system, and f1: a focal length of the front group and wherein the rear group has positive refractive power and consists of a positive lens and a negative lens in this order from the object side.