Patent ID: 8081392

Claim:
A lens barrel that is used with a zoom lens capable of focusing on a short distance subject by moving two mutually adjoining lens groups with a change in a space between them yet in a varying amount in an optical axis direction depending on a zooming position, characterized by comprising: a means for rotating and moving a zoom frame in an optical axis direction upon zooming, a first lens group cam groove provided in said zoom frame, a first lens group frame that is integral with a first lens group cam pin that moves in engagement within the first lens group cam groove, a first keep means for keeping said first lens group frame against rotation about an optical axis, a second lens group cam groove provided in said first lens group frame, a second lens group frame that is integral with a second lens group cam pin that moves in engagement within said second lens group cam groove, and a second keep means for keeping said second lens group frame against rotation about the optical axis, and further comprising a focusing means that rotates said first keep means about the optical axis to rotate said first lens group frame about the optical axis.