Canon AE-1 Instructions Manual page 19

When removing a lens, take special care
. , ,
to damage the protruding pins and levers
on the rear. With the exception of the Fish-
eye 7.5mm lens, always put a lens down
with the rear facing up.
For more information on general use and
cae of the lens, please see the lens instruction
booklet.
2
Setting the Aperture Ring to the
"A" Mark
For cwrect automatic exposure control.
only an FD lens can be used and the lens
aperture ring must
be
set
t o the
" A
mark.
To do this, simply hold inthe EE lock pin on
the lens while turning the aperture ring from
the minimum aperture tothe "A" mark. This
can be done either before or after the lens is
mounted on the camera. At the
"A"
mark,
the aperture ring is locked and cannot be
turned t o any other setting. Reverse the
procedure to disengage the aperture ring from
the
"A"
mark.