FISHEYE ZOOM LENS, OPTICAL DEVICE, METHOD FOR MANUFACTURING THE FISHEYE ZOOM LENS

摘要

PROBLEM TO BE SOLVED: To provide a fisheye zoom lens that is further improved in optical performance, an optical device including the fisheye zoom lens, and a method for manufacturing the fisheye zoom lens.;SOLUTION: A fisheye zoom lens ZL includes, in order from an object side, a first lens group G1 having negative refractive power and a second lens group G2 having positive refractive power. During zooming from a shortest focal length state to a longest focal length state, a distance between the first lens group G1 and the second lens group G2 changes. A portion of the second lens group is a focusing lens group G2F, and during focusing, the focusing lens group G2 moves on an optical axis.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2017,JPO&INPIT