50mm · f/3.5
The Canon Serenar 50mm f/3.5 II is a collapsible Leica Thread Mount lens with a 4-element Tessar-type design. Optically, it is sharp across the frame by f/5.6, with slight vignetting at wider apertures and moderate contrast; color rendition is somewhat muted. Build quality is solid brass, with smooth manual aperture and focus rings. The lens is well-suited for vintage-style street photography, though its f/3.5 maximum aperture limits low-light use.