Canon A-1 - Manual (Page 155)

2) Automatic Flash
b u F E . B
M
3) Manual Flash
b u F
M
The “B” setting is useful in flash photo­
graphy for lightening the subject’s back­
ground. At this setting, the flash of the
Speedlite synchronizes with the opening of
the first shutter curtain.
5. Ordinary Flash Photography with
Flashes other than the Canon Speedlites
When flashes other than the four special
Canon Speedlites are used with the A-1, the
digital readout will include the same infor­
mation as in manual override. See p. 65.
However, since the aperture displayed has no
meaning in this case, it might cause less con­
fusion to switch off the viewfinder display
lever.