Canon A-1 - Manual (Page 65)

button. AE photography is not possible at
the “B” setting. The aperture must be set
manually. Remember that it is very im­
portant to use a tripod and a cable release,
preferably with a lock, in long exposures to
reduce the chance of image blur. Also, since
long exposures present a real drain on the
battery, it may be wise to carry a spare.
The A-1 has a hot shoe and PC outlet for an
X-synch (flash synchronization) at 1/60 sec.
(the position). This shutter speed need not
be considered, however, when the A-1 is
used with specified Canon flash units (see
page 83).
Intermediate settings on the shutter speed
scale cannot be used. However, if you
accidentally set an intermediate shutter
speed, the camera will automatically select
the next lower or higher shutter speed as the
effective
shutter speed, and that shutter
speed will be displayed when you take an
exposure preview.
If you mistakenly try a time exposure on
“bulb” while the lens is still at “A”, ex­
posure will take place at the lens minimum
aperture.