The Canon EOS 1 is a 35mm autofocus single-lens reflex camera using the Canon EF lens mount. Introduced in 1989, it was the first model in Canon's professional EOS film SLR line, positioned for working photographers when new.

Sales data for the EOS 1 is thin: the single UK auction hammer result on record is £56 in August 2025, which gives a wholesale saleroom reference point rather than a reliable market range. As of 2026 a working EOS 1 body typically sells for a modest sum at auction, but condition, shutter count and inclusion of original accessories materially affect value, and a clean example with a working LCD can be worth noticeably more than a tired one.