The Canon 50mm f/1.2 is a fast standard prime rangefinder lens in Leica thread mount (L39/LTM), produced for Canon's screw-mount rangefinder bodies of the 1950s. It was designed as a low-light standard for 35mm rangefinder photography, competing directly with the fast Leica and Nikon normals of the era.

At recent UK auction, hammer prices for this 50mm f/1.2 have ranged from £230 to £325, with only two recorded sales giving a midpoint around £278. As of today in 2026, condition is the dominant driver of what a clean example is worth, and copies free of haze and cleaning marks sell for more than glassy but hazy ones at saleroom level.