Optical system, optical apparatus, and method for manufacturing optical system

Abstract

An optical system used in an optical apparatus, such as a camera 1, is configured to include a plurality of lens groups such that at focusing the distances between the lens groups are varied, that a final lens group disposed closest to an image side of the lens groups includes at least one lens surface having a pole, and that all of the following conditional expressions are satisfied: 0.020<Y/f<0.120  (1) 0.010<Bf/TL<0.150  (2) where Y is image height, f is the focal length of the optical system, TL is the total optical length of the optical system, and Bf is the back focus of the optical system.

Dependencies are inferred from the claim text.