The Canon Serenar 28mm f/3.5 is a manual-focus wide-angle rangefinder lens in Leica thread mount (L39/LTM), produced by Canon before the company adopted the Canon-branded lens name. It was designed for use on Canon and Leica screw-mount rangefinder bodies and sits among the early postwar Japanese wide-angles that expanded the L39 system.

At recent UK auction, hammer prices for the Serenar 28mm f/3.5 have clustered between £150 and £220, with a median result of £170 — a useful guide to what the lens is worth at saleroom level today. As of 2026, clean, haze-free copies with original caps and finders tend to sell for the upper end of that range, while examples with optical faults fetch less. Buyers should remember these are wholesale hammer figures rather than retail asking prices.