Canon 550ex Full Manual page 34

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 TTL autoflash system controls the flash exposure based on
the camera-selected
aperture.
1 Set the camera's picture-taking mode
' t o T v a n d s e t t h e d e s i r e d s h u t t e r
speed anywhere from 30 sec. to the
top sync speed.
O S e t t h e 5 5 0 E X ' s f l a s h m o d e t o
-
T T L .
3
Focus the subject.
L Check that the subject distance is
-t
within the flash range displayed on
the 550EX's LCD panel.
v the viewfinder, then take the picture.
f _ : 7 1 l f t h e a p e r t u r e d i s p l a y b l i n k s , t h e , # F c k g r o u n d m a y t u r n o u t o v e r e x p o s e d o r
Hl
underexposed. In such a case, changefie shutter speed until the aperture display stops
blinking.
"H
f
I I I I I - I
0 . 5 0 . 7 1 1 . 5 2
3
4
6
9 1 3 1 8 m
83