Canon's first 35mm SLR — the Canonflex, R breech-lock mount, cloth shutter to 1/1000, 1959.
The Canonflex was Canon's first 35mm single-lens-reflex camera, introduced in 1959 as the company's entry into the interchangeable-lens SLR market alongside established rangefinder work. It launched the Canon R breech-lock lens mount, the ancestor of the later FL and FD systems, and sat at the top of the early line as a system camera aimed at serious and professional users.
As a 35mm SLR it used the Canon R breech-lock bayonet and a cloth focal-plane shutter running from 1 second to 1/1000 with bulb. Exposure was set manually; the body itself carried no built-in meter, with metering handled by an accessory clip-on selenium meter. Film advance on the original model used a bottom-mounted trigger-wind lever rather than a conventional top thumb lever, a distinctive early Canonflex trait.
The Canonflex suits collectors and users interested in the origins of Canon's SLR line and the early R-mount glass. Its all-mechanical operation and metal construction give a deliberate, hands-on shooting experience, though the bottom trigger wind and lack of an integral meter make it slower to work with than later bodies. It is best treated as a considered, manual-first camera.
On the used market these early bodies are scarce and prized by collectors, so condition varies widely. Check the cloth shutter for pinholes, capping or uneven travel across the speed range, and confirm the trigger-wind mechanism advances film smoothly. Inspect the prism and viewfinder for haze or desilvering, and examine any perished light-seal foam. The clip-on selenium meter, if present, may read low or dead with age. R-mount lenses can be adapted to mirrorless bodies for continued use.