| CPC G02B 13/0035 (2013.01) [G02B 9/04 (2013.01); G02B 9/12 (2013.01); G02B 13/003 (2013.01)] | 19 Claims |
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1. An imaging lens comprising, successively in order from a position closest to an object side to an image side: a first lens group; and a second lens group that has a positive refractive power,
wherein during focusing, the first lens group remains stationary with respect to an image plane, and only the second lens group moves,
a lens closest to the image side in the second lens group is a negative meniscus lens having a surface convex toward the object side,
assuming that
a paraxial radius of curvature of an object side surface of the negative meniscus lens of the second lens group is rF, and
a height measured from an optical axis to a top of an image is Y,
Conditional Expression (1) is satisfied, which is represented by
0.5<rF/Y<3 (1),
a lens closest to the object side in the first lens group is a negative meniscus lens having a surface convex toward the object side,
assuming that
a focal length of the first lens group is f1, and
a focal length of the second lens group is f2,
Conditional Expression (8) is satisfied, which is represented by
0.05<f2/f1<0.32 (8), and
assuming that a paraxial radius of curvature of an image side surface of the negative meniscus lens of the second lens group is rR, Conditional Expression (2) is satisfied, which is represented by
0.06<(rF−rR)/(rF+rR)<0.27 (2).
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