The Canon R lens mount is a physical standard for connecting a camera lens to a 35mm single-lens reflex camera body. It was introduced in March 1959 along with the Canon Canonflex.

The R mount was used on Canon's first single lens reflex (SLR) camera. The mount employed a "breech lock" system to attach the lens to the camera body.^[1]

The R mount was discontinued in 1964 and replaced with the Canon FL lens mount.^[2] Many mirrorless interchangeable-lens cameras are able to use Canon R lenses via an adapter. The mechanism for controlling the aperture is different from both the later FL and FD mount, although they physically still can mate with most adapters.

R cameras

• Canon Canonflex (1959)^[1]
• Canon Canonflex R2000 (1960)^[3]
• Canon Canonflex RP (1960)^[4]
• Canon Canonflex RM (1962)^[5]

R lenses

Source:^[6]

Zoom

• 55-135mm f/3.5 (1963)

Wide-angle (under 50mm)

• 35mm f/2.5 (1960)

Standard (50–60mm)

• 50mm f/1.8 I (1959)
• 50mm f/1.8 II (1960)
• 50mm f/1.8 III (1963)
• 58mm f/1.2 (1962)

Telephoto (above 60mm)

• 85mm f/1.8 (1961)
• 85mm f/1.9 (1960)
• 100mm f/2 (1959)
• 100mm f/3.5 I (1961)
• 100mm f/3.5 II (1963)
• 135mm f/2.5 (1960)
• 135mm f/3.5 I (1959)
• 135mm f/3.5 II (1961)
• 200mm f/3.5 (1959)
• 300mm f/4 (1960)
• 400mm f/4.5 (1960)
• 600mm f/5.6 (1960)
• 800mm f/8 (1960)
• 1000mm f/11 (1960)
• 2000mm f/11 (1960)

References

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