Patent ID: 8797655
Filing Date: 2014-08-05
Classification: G02B

Abstract:
1. A zoom lens comprising: a lens unit Ln having negative refractive power; a lens unit Lp a lens unit Lp wherein the lens unit Ln includes two or less lenses and moves during focusing and zooming, the lens unit Lp wherein the zoom lens satisfies the following conditions: where Tlw denotes a distance between a lens surface of the entire zoom lens nearest to the object side and an image plane at a wide-angle end, Dnw denotes a distance between a lens surface of the lens unit Ln nearest to the image side and the image plane at the wide-angle end, bfw denotes a back focus at the wide-angle end, Mfnt denotes a maximum amount of focusing movement of the lens unit Ln at a telephoto end by assuming movement from the object side to the image side to be positive during focusing from infinite distance to close distance, and Mnz denotes an amount of change in distance between the lens unit Ln and the lens unit Lp