Canon AE-1 PROGRAM Instructions Manual page 48

In portraits and still-life shots , a particular aper-
ture may be more important to your picture than
a particular shutter speed . To get the aperture
you want in shutter-speed priority AE, simply
turn the shutter speed selector dial , while press-
ing the exposure preview switch , until the de-
sired f-number appears in the viewfinder. Keep
in mind that the shutter speed should not be
slower than 1/ 60 second for handheld shooting
with a standard lens .
48