公开(公告)号：US11880023B2

公开(公告)日：2024-01-23

申请号：US17093829

申请日：2020-11-10

Applicant: TAMRON CO., LTD.

Inventor： Masaki Sato ,  Yuki Mori ,  Hironori Taguchi

IPC: G02B15/14 ,  G02B15/177

CPC classification number: G02B15/143507 ,  G02B15/144511 ,  G02B15/177

Abstract: A zoom lens according to the present invention includes sequentially from an object side: a first lens group having negative refractive power, and a second lens group having positive refractive power, and performs a magnification change operation by changing a gap between the adjacent lens groups. The zoom lens has specific optical characteristics represented by four expressions relating to the second lens group.