Canon A-1 - Manual (Page 153)

The digital readout will be the same as in
AE flash control but will also include the
“M” signal for manual aperture control.
Though the set flash auto working aperture
value is displayed in the readout, it is not
automatically set as in AE flash control.
The same aperture value as set on the flash
must be manually set on the lens aperture
ring. As in AE flash control, the shutter
speed is automatically set at 1/60 sec. as
long as the AT dial is not at “B”.
When using an FD lens, exposure warnings
are the same as those for AE flash control.
Since FL lenses lack a full aperture signal pin,
you cannot always rely on the digital read­
out of apertures and exposure warnings. It
is, therefore, advisable to switch off the
viewfinder display lever.
B D
E . B
M
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8
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