The Canon Serenar 85 mm f/ 2.0 is a fast portrait lens for rangefinder cameras with the M39 Leica screw mount.
The lens has a chrome metal body. The aperture ring has no click stops.
The junction plane of the lens with a rangefinder camera has the form of a flange, and not an end ring. Care should be taken when mounting the lens on Soviet FED and Zorkiy cameras so as not to jam or damage a rangefinder's cam. The lens has been designed for Canon, Leica, Bessa R rangefinder cameras.