公开(公告)号：US10302921B2

公开(公告)日：2019-05-28

申请号：US15666874

申请日：2017-08-02

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Hiroaki Suzuki ,  Yoshiaki Kurioka ,  Takehiro Nishioka ,  Hisayuki Il

IPC: G02B13/00 ,  G02B15/20 ,  G03B17/14 ,  H04N5/225 ,  H04N5/232 ,  G02B15/173

Abstract: A zoom lens system comprises, in order from an object side to an image side: a first lens group having a positive power; a second lens group having a negative power; an aperture stop, a third lens group having a positive power; and a fourth lens group having a negative power. During zooming, a total length of the zoom lens system does not change, while a distance between each adjacent two of the lens groups changes, and the aperture stop moves along an optical axis independently of the second lens group and the third lens group. The zoom lens system satisfies condition (1) 6.0