Overview

The Canon Serenar 50mm f/1.9 is a collapsible LTM lens from 1949, inspired by the Leitz Summitar. Optically, it offers sharp center performance when stopped down, but wide open it is soft with low contrast, field curvature, and swirly bokeh. Weaknesses include corner softness and susceptibility to flare. Build features a clickless aperture and 15 blades. It suits photographers seeking vintage character for atmospheric night street or portrait work.