ZOOM OPTICAL SYSTEM, OPTICAL APPARATUS AND METHOD FOR MANUFACTURING THE ZOOM OPTICAL SYSTEM
卷宗概要
发明人
Hiroshi YABUMOTO
IPC 分类
CPC 分类
This zoom optical system (ZL(1)) has a plurality of lens groups (G1-G7), wherein when during zooming, distances between adjacent lens groups vary. The plurality of lens groups include: a first focused lens group (G6) that moves during focusing; and a second focused lens group (G7) that is disposed closer to an image plane side than the first focused lens group and moves during focusing along a trajectory that is different from that of the first focused lens group. The first focused lens group (G6) and the second focused lens group (G7) both have a negative refractive power and satisfy the following conditional expression, 0.40<fF1/fF2<6.00, where fF1: focal length of first focused lens group and fF2: focal length of second focused lens group.
原文（中文）
This zoom optical system (ZL(1)) has a plurality of lens groups (G1-G7), wherein when during zooming, distances between adjacent lens groups vary. The plurality of lens groups include: a first focused lens group (G6) that moves during focusing; and a second focused lens group (G7) that is disposed closer to an image plane side than the first focused lens group and moves during focusing along a trajectory that is different from that of the first focused lens group. The first focused lens group (G6) and the second focused lens group (G7) both have a negative refractive power and satisfy the following conditional expression, 0.40<fF1/fF2<6.00, where fF1: focal length of first focused lens group and fF2: focal length of second focused lens group.