Canon SPEEDLITE 155A Instructions Manual page 22

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HOW TO USE WITH THE CANON
AT-1
HOW TO USE WITH THE CANON
AV-1
Since the Canon AT-1 is not an AE (Auto¬
matic Exposure) camera, it is necessary to
manually set the lens aperture ring to the pre¬
scribed f/stop for automatic flash photog¬
raphy. However, at any shutter speed except
"B" the shutter speed will be automatically
set
to
the
X
synchronization
speed of
1/60 sec. when the pilot lamp glows. Refer to
Part
II
(p.
19) regarding more detailed
explanatioa For manual flash photography
with the AT-1 refer to pp. 20-21.
Automatic flash photography with the AV-1
is briefly as follows:
1. Set the camera's selector dial to (A] or "A
Self".
2. Set the AUTO/MANU. switch to either
the green or red AUTO position and read
the
corresponding
aperture
from
the
calculator dial.
3. Set that same aperture on the lens aperture
ring.
The shutter speed will be set automatically
to the X-synchronization speed of 1/60 sec.
and the meter needle in the viewfinder will
point to 1 /60 sec. when the pilot lamp glows.
Refer to Part II (p. 19) regarding more de¬
tailed explanation. For manual flash photog¬
raphy with the AV-1 refer to pp. 20-21.
22

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