Canon Speedlite 550EX Instructions Manual page 83

Using Flash in Other Camera Modes
(2) Tv: Shutter Speed-Priority AE and TTL
Autoflash
By selecting the shutter speed, you can obtain various effects with flash. You
can set the shutter speed from 30 sec. to the top sync speed. The camera
then sets the aperture automatically to obtain a correct exposure for the
background. The TIL autoflash system controls the flash exposure based on
the camera-selected aperture.
Tv /
/ TTL
-------
O.5Q.11U' 3 ~ . ~ n ll m
60 56 I •
1
Set the camera's picture-taking mode
to Tv and set the desired shutter
speed anywhere from 30 sec. to the
top sync speed.
2
Set the 550EX's flash mode to
TTL.
3
Focus the subject.
4
Check that the subject distance is
within the flash range displayed on
the 550EX's LCD panel.
5
Check thallhe
t
icon is displayed in
the viewfinder, then take the picture.
I§I If the aperture display blinks, the background may turn oul
o~erexposed
or
l.II
underexposed. In sllCh a case. change the shutter
speed
until the aperture display stops
blinking.
8: