Canon 155 A User Manual
Page 36
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Setting the AUTO/MANU. switch at the
back to MANU. places the 155A in the
manual mode. When using the A-1, AE-l"
AT-1 or AV-1, the shutter speed is set auto
matically as in automatic flash photography.
The aperture must be determined for each
change in shooting distance either by guide
number calculation or by using the calcu
lator dial on the flash as described in the
following:
1. Set the AUTO/MANU. switch to MANU.
2. Be sure to set the film speed on the flash.
3. Focus on the subject.
4. Read the focused distance on the lens’
distance scale.
5. Look for the same distance on the 155A’s
calculator dial.
6. Take note of the aperture against that
20
distance on the calculator dial and set
Ill, Manual Flash Photography