Canon A-1 User Manual
Page 175
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release.
Pressing
it
halfway
activates
meter circuit, pressing it all the way sets
shutter in operation. Can be locked by
setting
main
switch
to
“L”
to
guard
against
accidental
shutter
release.
With
cable release socket.
Power Source:
One 6V silver oxide battery
(Eveready No. 544, UCAR No. 544, JIS
4G13, Mallory PX28) or alkaline man
ganese
battery
(Eveready
No.
537,
UCAR No. 537). The battery lasts ap
proximately one year under normal use.
Battery is loaded in the battery chamber
on the front of the camera body.
Battery
Check:
A
red
LED
on
top
of
camera flashes on and off to indicate
power level when battery check button is
pressed.
Flashing
frequency
decreases
with power level.
Main Switch: Two positions: “A” and “L”.
At “L” all active circuits are off and
shutter button is locked as safety feature.
Doubles as self-timer lever.
Cancellation
of
Camera
Circuit:
Shutter
and self-timer operation cancelled by set
ting main switch to “L” or by pressing
battery check button.
Multiple
Exposure:
Possible
by
setting
multiple
exposure
lever
before
winding
film
advance
lever
to
recock
shutter.
Frame counter does not advance. Auto-
maticiJly resets. Unlimited.