Canon 155 A - Manual (Page 34)

in uneven flash distribution.
n. Automatic Flash Photography
When the AUTO/MANU. switch is on
AUTO, it is necessary ito set the aperture
manually when using an FL lens, (or when
using the flash on the AT-1 or AV-1). Setting
the aperture manually can also be done when
using an FD lens on the A-1 or AE-1 when
the aperture ring is disengeged from “A”
for making exposure corrections. The
shutter speed will automatically be set to
1/60 sec. (unless set to “B”) on the A-1,
AE-1, AT-1 or AV-1. Make sure the ASA
film speed is set on the flash.
1. using an FD lens, disengage the aperture
ring from the “A” mark.
2. Pre-select an aperture on the flash by
setting the AUTO/MANU. switch to the
red or green AUTO position. Take into