Vintage wide-angle prime lens for L39 mount rangefinder cameras.
The Canon Serenar 28mm f/3.5 is an early wide-angle lens for the Leica Thread Mount (LTM/L39), produced by Canon under the Serenar brand name in the early 1950s. Canon's Serenar designation was used for their earlier rangefinder lenses before transitioning to the Canonlens name. This lens represents Canon's earliest wide-angle optical development for the 35mm rangefinder system.
28mm focal length, f/3.5 maximum aperture, Leica Thread Mount (L39/LTM) screw mount, Canon Serenar designation (early 1950s production), early Canon anti-reflection coating.
The Canon Serenar 28mm f/3.5 is a historically significant early Canon lens, representing the company's first-generation wide-angle rangefinder optics. It predates modern multi-coating and uses single-layer anti-reflection treatment. Collector interest is high for complete, functioning examples. Compatible with Leica M cameras via L39-to-M adapter.
Inspect all elements for haze, fungus, and the condition of the early single-layer coating. Confirm L39 thread engagement is clean. Check aperture blades for oil. Early Canon Serenar lenses can show edge haze typical of post-war optical glass of this era.