Canon Speedlite 550EX Instructions Manual page 29

Using Flash in Other Camera Modes
-
( 2) Tv : Shutter Speed-Priority AE and E-TTL
Autoflash
By selecting the shutter speed, you can obtain various effects with flash. You
can set the shutter speed from 30 sec. 10 the lOP sync speed. The camera
lhen sets the aperture automatically to obtain a correct exposure for the
background. The E-TIL auloflash system controls the flash exposure based
on the camera-selected aperture.
Tv
ETTL
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0.' 0." 1 . 5 2
J
4
i l U I . " ,
~ GO
55 •
1
Sellhe camera's picture-laking mode
10 Tv and set the desired shutler
speed anywhere from 30 sec. to the
top sync speed.
2
Sel the 550EX's
ETTL.
3
Focus the subject.
!lash mode to
4
Check that the subject distance is
within the flash range displayed on
the 550EX's LCD panel.
5
Check that the
l
icon is
displayed in
the viewfinder, then take the picture.
~
If
the aperturl! display blink s, the background may turn out overexposed or
l..Il
underexposed. In sllCh a case, change the shutler
sptIf!d
untiltne aperture display stops
blinking.
29