Canon AE-1 PROGRAM User Manual

ing Situations)
2. Adjusting the ISO/ASA
Sometimes, in a theater or concert hall, for
instance, where it is quite dark, the AE-l
PROGRAM's meter may be overinfluenced by
the darkness and your subject will come out too
light. To expose your subject correctly, tum the
ISO / ASA film speed lever to a higher number.
Each full step on the ISOI ASA film speed scale
equals one f/ stop. If ISO/ ASA 200 film is
loaded, for instance, and you turn the lever to
ISO I ASA 400 , your subject will receive one
fl
stop less exposure. Exactly how much higher
you
should set the ISOI ASA film speed depends
on the situation. To be on the safe side, you
may
wish to bracket the exposure (see "Note
#2," next page) .
55
3. Manual Override
Instead of using the AE lock switch or changing
the ISOI ASA, you can also make an exposure
correction by canceling AE photography . When
you do this, you will be setting both shutter
speed and aperture by yourself. This is called
manual override and is useful whenever you
want to set a different aperture than the one the
AE-l PROGRAM would select automatically in
AE.
Note
Just as doubling the ISO/ ASA will underexpose the
picture one fl stop , halving it (setting the lever to
ISOI ASA 100 for ISOI ASA 200 film) will over-
expose the picture one f/stop.
Following exposure, do not forget to reset the film
speed lever to the correct ISOI ASA film speed, or
all following frames will be incorrectly exposed!

Canon AE-1 PROGRAM Specifications

General

Brand	Canon
Model	AE-1 PROGRAM
Category	Film Camera
Language	English