The Canon 28mm f/3.5 is a wide-angle rangefinder lens in Leica Thread Mount (L39), part of Canon's post-war screw-mount line built for Leica-compatible rangefinder bodies. It predates the FD bayonet system and was intended as a moderately wide reportage and landscape optic for 35mm film rangefinders.

At recent UK auction, hammer prices for this lens have clustered tightly, with a sale at £260 in 2023 and an earlier result of £240 in 2008 — giving a median around £250 at saleroom level. As of 2026, that is broadly what a clean, working copy sells for at auction, though retail dealer asking prices typically sit above these wholesale figures. Condition, clarity of glass and the presence of the correct finder or caps are the main factors that move the price within this narrow band.