Canon AE-1 User Manual
Page 107
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aperture ring manually. When you are using a
Canon FL lens which does not allow full
aperture metering, automatic flash photo
graphy can be performed by setting the
prescribed f/stop on the lens manually. In
both cases, the shutter speed is automatically
adjusted to the X synchronization speed of
1/60 sec.
As the Speedlite 155A uses a unique
averaged light sensing system which keeps
down the distribution of the reflected light
from the center, the influence of the back
ground is greatly reduced. Thus, the 155A
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