Canon A-1 - Manual (Page 96)

is set for flash photography while “buLb"
replaces the shutter speed data when the AT
dial shutter speed scale is set to “B”. “M" is
also
displayed at the “B” setting. The
flashing “EEEE EE” appears to warn of
error in the stopping-down process and ■will
be explained in more detail later in this
instruction booklet.
When switching from one priority to another
under the same exposure conditions, it is
possible that the new camera-selected var­
iable will differ a half step from the corres­
ponding previously manually-selected value.
For instance, a combination of 1/250 sec.
and f/5.6 in the shutter-speed priority AE
mode may become 1/180 sec. at f/5.6 in the
aperture priority AE mode under the same
conditions. This is due to the fact that the
camera-selected value is rounded off to half
steps in the display. However, since the
camera actually controls its variable stepless-
ly, this seeming discrepancy will have no
effect upon exposure.
Incorrect Exposure Warnings
The types of incorrect exposure warnings
depend on what AE mode you arc using.
1. In shutter-speed priority AE mode
When exposure is incorrect, the LED digital
readout for aperture flashes on and off.
U nderexpo sure
Usually the digital readout for aperture