The Canonet QL 17 GIII is the final, high-end version of Canon's famous Canonet compact rangefinder series of the 60s and 70s. It provides shutter-priority auto-exposure and parallax compensation with its 40mm f/1.7 lens. The lens is sharpest at f/4 - f/5.6 [1]. Its Copal leaf shutter offers shutter speeds from 1/4 to 1/500, with X flash sync at any speed.