Canon AE-1 PROGRAM Instructions Manual page 56

1. Set a shutter speed by turning the shutter
speed selector dial.
2. Remove the lens from" A " and set an aper-
ture by turning the aperture ring.
56
Notes
When you press the shutter button halfway, the
aperture that the AE- 1 PROGRAM would select
automatically will light up. You may wish to use this
aperture reading as a basis for setting an aperture
on the aperture ring . A red "M" will light up in the
viewfinder to remind you that the lens is removed
from "A."
2. You may find it worthwhile to bracket the exposure.
This means taking several shots at different
exposures so that at least one of them turns out
correctly exposed . Take the first shot at the
exposure you think is right. Then take two more,
one with the aperture ring set one step higher and
the other with it set one step lower. It is possible to
do the same thing by chang ing the ISO/ ASA setting
or the shutter speed .