Patent ID: 9488813
Filing Date: 2016-11-08
CPC Classification: G02B,H04N

Claim Text:
1. A zoom lens system comprising lens units each being composed of at least one lens element, the zoom lens system, in order from an object side to an image side, comprising: a first lens unit located closest to the object side, and having positive optical power; a second lens unit having negative optical power; and subsequent five or six lens units, wherein an aperture diaphragm is provided, intervals between the adjacent lens units vary in zooming from a wide-angle limit to a telephoto limit at a time of image taking, the first lens unit moves along an optical axis in the zooming and is fixed with respect to an image surface in focusing from an infinity in-focus condition to a close-object in-focus condition, and the following conditions (1), (2), and (3) are satisfied: where BF is a distance from an apex of an image side surface of a lens element located closest to the image side, to the image surface, f D L D Y is a maximum image height expressed by the following formula: f ω