Patent ID: 9709778
Date: 2017-07-18
CPC Classifications: G02B

Claim:
1. An imaging lens consisting of, in order from the object side to the image side: a front group having a negative refractive power; a stop; and a rear group having a positive refractive power; the front group consisting of, in order from the object side to the image side, a front group negative lens group having a negative refractive power, constituted by two negative lenses, and a front group positive lens group having a positive refractive power, including one positive lens and one negative lens, in which a positive lens is provided most toward the object side; the rear group consisting of, in order from the object side to the image side, a positive lens, a first cemented lens formed by cementing a positive lens and a negative lens together, and a second cemented lens formed by cementing a positive lens and a negative lens together; and Conditional Formula (1) below being satisfied: wherein Nan is the refractive index of the negative lens provided most toward the image side within the front group positive lens group with respect to the d line, and νan is the Abbe's number of the negative lens provided most toward the image side within the front group positive lens group with respect to the d line.