Canon AE-1 User Manual
Page 57
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Changing the Lens
FD lense$ incorpordts a safety mechanism
to prevent the bayonet ring and the
diaphragm blades from moving when the lens
is not mounted on the carmra. To bypass this
safety mechanism« press the lock pin in the
top recess of the bayonet mount while turning
the bayonet rirsg. Orsce this safety mechanism
has thus been carKdIed. you can see the
diaphragm blades move v^en activated.
Since FD lenses have signal pim arsd
levers which couple with the camera body«
special care must be taken not to damage
them. Ona basic pracaution is to always put
the lens down facing down whenever you
must change lenses.
The following lenses cannot be used with
the built-in meter because the extended rear
part of the lerts will push in the lens speed
adjustmertt pin on the camera body:
FL
19mmf/3.6
R 36mm 1/2.5
FL
35mmf/2.6
R 50mm f/1.8
FL
60mmf/1.8
R 100mm f/2
FL 58mm f/1.2
These lertses should only be mounted on the
camera after the film has been advanced.
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