| CPC G02B 13/0035 (2013.01) [G02B 9/12 (2013.01); G02B 13/006 (2013.01)] | 19 Claims |
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1. An imaging lens consisting of, in order from an object side to an image side:
a first lens group that has a positive refractive power;
a second lens group that has a positive refractive power; and
a third lens group, wherein:
during focusing, the second lens group moves along an optical axis, and the first lens group and the third lens group remain stationary with respect to an image plane,
the second lens group includes a stop,
an Lp1 lens, which is a positive lens, is disposed closest to the object side in the second lens group,
an Lp2 lens, which is a positive lens, is disposed closest to the image side in the second lens group, and
assuming that
an average value of refractive indexes of the Lp1 lens and the Lp2 lens at a d line is Np12, and
an average value of Abbe numbers of all negative lenses included in the second lens group based on the d line is νn,
Conditional Expressions (1) and (2) are satisfied, which are represented by
1.94<Np12<2.5 (1), and
28.4<νn<40 (2), and
wherein the third lens group consists of, in order from the object side to the image side:
a cemented lens in which a positive lens and a negative lens are cemented in order from the object side; and
a negative lens that has a concave surface facing toward the object side.
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