Patent ID: 7035020

Claim:
A zoom lens comprising a cam barrel having a plurality of circumferential cam slots for zooming, stationary rectilinear guide means having axial guide slots disposed so that said axial guide slots overlap with said circumferential cam slots, respectively, a movable barrel inserted in said cam barrel so as to be rotatable and linearly movable in an axial direction within said cam barrel, said movable barrel having cam followers in slide engagement with both said circumferential cam slots and said rectilinear guide slots, respectively, so that said movable barrel is linearly moved in said axial direction with relative rotation between said cam barrel and said movable barrel so as thereby to move at least one lens element forming a part of a zoom lens system for zooming, and focus adjusting means for adjusting focus of said zoom lens system, said focus adjusting means comprising: a plurality of focus range selection means formed on said movable barrel for providing different ranges of focus of said zoom lens system; a selection member selectively attachable to said focus range selection means so as to enable either one of said different ranges of focus, and an access slot extending continuously from an extreme end of one or more said circumferential cam slot so as to be brought in line with said focus range selection means for access of said selection member to said focus range selection means from the outside of said cam barrel.