Canon F-1 Instructions Manual page 45

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FD Lens Mount (FL and R Series Lenses)
All Canon FD and FL lenses can be used with the Canon
F-1, except the FLP 38mm f/2.8.
It is also possible to attach and use all the R lenses for
the Canonflex. However, as the preset aperture me-
chanism differs, it is necessary to use manual diaphragm
control.
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