Canon New F-1 Instruction Manual page 5

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1 ATTACHING THE LENS
The following lenses cannot be mounted on the New Canon F-1:
FL 19mm f/3.5
FL 58mm f/1.2
R 50mm f/1.8
R 58mm f/1.2
Notes:
Do not push the stop-down slide while advancing the film. Otherwise, it may
be impossible to mount the lens.
Do not press the lens release button while mounting the lens or it may not
pop out, thus causing the lens to work incorrectly.
R 100mm f/3.5
R 100mm f/2
FLP 38mm
5
f/2.8