Patent ID: 6124987
Filing Date: 2000-09-26
Classification: G02B

Abstract:
A zoom lens consisting of a front lens group having a negative power as a whole, and a rear lens group having a positive power as a whole and including a stop therein, arranged in this order from an object side, wherein the front and rear lens groups are moved relative to each other on an optical axis for zooming, whereas only a positive lens placed at a rearmost position of the rear lens group in the order from the object side is moved for focusing, and the zoom lens satisfies the following conditions:0.5<ff/fR<5.00.01<.beta.f<1.00-1.0.ltoreq.r1/r2.ltoreq.0.3wherein fR represents a synthetic focal length of the rear lens group, ff represents a focal length of the rearmost positive lens, .beta.f represents an image magnification of the rearmost positive lens, r1 represents a radius of curvature of an object side surface of the rearmost positive lens, and r2 represents a radius of curvature of an image side surface of the rearmost positive lens.