Flash With Aperture-Priority Ae - Canon SPEEDLITE 220EX Instructions Manual

Flash with Other Modes

1) Flash with Aperture-Priority AE

When you want to control the
depth of field or when you want
the background to be correctly
exposed, use aperture-priority
AE. Set the desired aperture
and the camera sets the shutter
speed automatically to suit the
background light level. The TTL
autoflash control system regu-
lates the flash output according
to the aperture you set for opti-
mum flash exposure.
The shutter speed blinks in the viewfinder to alert you of a possible over-
exposed or underexposed background. If the maximum sync speed
blinks, the background will be overexposed. If the 30" sync speed blinks,
the background will be underexposed. Change the aperture setting until
the sync speed stops blinking and remains displayed.
30
A
v
1 Set the camera to Av
(Aperture-priority AE) and
set the desired aperture.
2 Press the shutter button
halfway to focus on the
subject.
3
Check that is displayed
in the viewfinder and make
sure that the shutter speed
is not blinking in the
viewfinder. Then, press the
shutter button completely
to take the picture.