公开(公告)号：US09759899B2

公开(公告)日：2017-09-12

申请号：US15254000

申请日：2016-09-01

Applicant: FUJIFILM Corporation

Inventor： Hajime Inukai ,  Michio Cho

IPC: G02B15/14 ,  G02B9/60 ,  G02B15/17 ,  G02B27/00 ,  G02B15/15 ,  G02B15/22 ,  G02B15/20 ,  G02B9/34 ,  G02B9/00 ,  G02B5/00 ,  G02B15/16 ,  G02B13/18 ,  G02B3/04 ,  G02B13/00

CPC classification number: G02B15/17 ,  G02B3/04 ,  G02B5/005 ,  G02B9/00 ,  G02B9/34 ,  G02B9/60 ,  G02B13/0045 ,  G02B13/006 ,  G02B13/009 ,  G02B13/18 ,  G02B15/14 ,  G02B15/15 ,  G02B15/16 ,  G02B15/20 ,  G02B15/22 ,  G02B27/0025

Abstract: A zoom lens is constituted by, in order from the object side to the image side: a positive first group which is fixed when changing magnification, a negative second lens group which moves when changing magnification, a negative third lens group which moves when changing magnification, and a positive fourth lens group which is fixed when changing magnification. The first lens group is constituted by a 1a lens of a negative meniscus shape, a positive 1b lens, and a positive 1c lens. The second lens group is constituted by a negative 2a lens, a biconcave 2b lens, a positive 2c lens, and a negative 2d lens. The third lens group is constituted by a negative 3a lens and a positive 3b lens. The fourth lens group includes a 4a lens, an aperture stop, and a positive 4b lens, which are consecutively provided from the most object side thereof.