The Canon 35mm f/1.8 is a fast wide-angle prime in L39 (Leica Thread Mount) screw mount, produced during Canon's rangefinder era for Canon's own L39 bodies and compatible Leica screw-mount cameras. It was designed as a reportage and available-light wide, offering a wider maximum aperture than most 35mm rangefinder lenses of its period.

At recent UK auction, hammer prices for this lens have ranged from £90 to £400, with a median around £255 across the four recorded results — wholesale saleroom levels rather than dealer retail. As of 2026, condition is the main driver of value: clean, haze-free examples sit at the upper end of what the lens sells for, while hazy or fungused copies are worth noticeably less. Buyers researching what a Canon 35mm f/1.8 L39 is worth should expect cosmetics and glass clarity to move the price by a factor of four within the same model.