Canon AE-1 PROGRAM Instructions Manual page 21

Look into the viewfinder and
press the shutter button half-
way. A green "P" and a num-
ber will appear to the right of
the field of view, indicating
programmed AE and the aper-
ture selected automatically by
the camera .
See pp. 34-41 for further
details on viewfinder informa-
tion .
I
[il
I
1.8
Exposure will be correct if the
aperture display does not
blink. The "P" will blink to
warn you of camera shake
when the shutter speed is
1 / 30 sec . or slower. If the "P"
blinks, use a flash or attach
the camera to a tripod . You
can also use a film with a
higher ISO/ ASA rating .
21
When there is not enough light
for correct exposure, the max-
imum aperture of the lens
blinks; " 16" blinks to indicate
too much light.
Note
When shooting with a lens
whose maximum aperture is
tll.8 or f / 3.5, for example, the
aperture display will indicate a
maximum aperture of either
f / l .4 or f / 2, or tl2 .8 or f /4 re-
spectively.