| CPC G02B 13/003 (2013.01) [G02B 9/08 (2013.01)] | 40 Claims |
|
1. An imaging lens comprising, successively in order from a position closest to an object side to an image side: a first lens group that remains stationary with respect to an image plane during focusing and has a positive refractive power; a stop; and a second lens group that moves during focusing and has a positive refractive power,
wherein the second lens group consists of all lenses, which integrally move during focusing, among lenses which are disposed closer to the image side than the stop, and
assuming that a maximum value of heights of a paraxial ray from an optical axis in the first lens group is H1max, in a case in which paraxial ray tracing is performed by causing the paraxial ray, of which a height from the optical axis on a lens surface closest to the object side in the first lens group is H1f, and which is parallel to the optical axis, to be incident from the object side, Conditional Expression (1) is satisfied, which is represented by
1.05<H1max/H1f<2 (1),
wherein the first lens group includes at least one positive lens and at least one negative lens, and
assuming that an average of Abbe numbers of all positive lenses in the first lens group based on a d line is v1p, and an average of Abbe numbers of all negative lenses in the first lens group based on the d line is v1n, Conditional Expression (6) is satisfied, which is represented by
5<v1p−v1n<45 (6),
wherein assuming that a height of the paraxial ray from the optical axis on a lens surface closest to the object side in the second lens group is H2f, Conditional Expression (2-2) is satisfied, which is represented by
1.7<H1max/H2f<3.5 (2-2), and
wherein the first lens group includes at least three cemented lenses, each of which is formed by cementing one positive lens and one negative lens.
|