Canon A-1 Instructions Manual page 57

3. In programmed AE mode
Both the shutter speed LED and the aper-
ture
LE.D
flash on and off simultaneously
LO
warn you of overexposure as well as under·
exposure. In taking exposure readings, the
shutter speed and aperture combination
changes as they are programmed in the
camera. However, if there should be too
little light to be exposed correctly even at
the maximum aperture, the maximum aper-
ture of the lens in use will remain fixed, and
the camera
will
work in aperture priority
AE, controlling the shutter speed to produce
correct exposure.
If
the camera exceeds the
limit of the meter coupling range, the
shutter speed and aperture
LE.
D values tha t
flash depend on the lens used and the ASA
film speed. When the data flashes on and o ff
in programm ed AE, photography is no long·
er possible in that mode unless you change
the light level or switch to a more appro·
priate film.
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-57-
Double-Check Before Shooting
1.
l s t he aperture ring of the lens set
t o the " A" mark?
2.
Have you c hecked the battery
power level?
3. Have you prop erly set the AE mode
selector?
The Tv setting (shutter priority AE)
is preferable for action photo-
graphy. The
Ay
(aperture prior:\ty
AE) is preferable for
s~ill
photo-
. graphy.) · · · •
4.
Did yo u
set
the film speed pro-
perly?
This i· s essential to the proper
operation of the camera. See that
the memo holder tells the type of
film loaded in the camera.
5.
Is the [ilm p ro p erly loaded?
You can use t he rewind knob
as
an
indicator that the film is properly
loaded. Every time you advan ce the
film,
the r ewind knob. should
rotate.
· 6. l s
the main switch· set · to ·
the "A"
mark?
At the "L" setting, the shutter
button is locked.