Av Aperture-Priority Ae And E·ttl Aulotlash - Canon Speedlite 550EX Instructions Manual

Using Flash In Other Camera Modes
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(1)
Av : Aperture-Priority AE and E-TIL Autoflash
This mode is effective for controlling the depth of field in your flash pictures.
vou can also obtain a balanced exposure between the subject and
background. You set the aperture and the camera sets the shutter speed
automatically to obtain a correct exposure for the background. The E-TTL
autoflash system obtains the proper exposure based on the aperture you set.
A ,,//
/ ETTL
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1
Set
the camera's picture-taking mode
lo Av.
2
Set the 550EX's flash mode to
ETTL.
3
Focus the subject.
4
Check thai the subject distance is
within the flash range displayed on
the 550EX's LCD panel.
5
Check thal lhe
t
icon is displayed in
the viewfinder, then take the picture.
I§I
"the
top sync
speed
display blinks, !he background wilt be OYefexpo58li And if the
30"
LjI
shultfJf speed display blinks, the backl/found will be underelq)OSed. In such caSH,
change the
apeftlJle
unt~
the sooner speed display Slops blinking.
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