Canon 550EX - Manual (Page 65)

Wireless E-TTL Autoflash With Flash Ratio ON
Press the <SEL/SET > button to
register the flash ratio.
• The flash ratio bar stops blinking and
remains displayed
• To indicate that a flash ratio has been set,
A:B will remain displayed on the
master unit’s LCD panel.
Follow the basic procedure for
wireless E-TTL autoflash picture­
taking on page 60 and take the
picture.
During the setting procedure, A:B and blink for 8 sec. and then remain
displayed. To make them blink again (so you can alter the flash ratio), press the
< SEL/SET > button again.
The flash ratios corresponding to the • positions on the flash ratio scale are shown
below
8:1 • 4:1 2:1
1:l
1:2 • 1:4 • 1:8
(1:2 8) (1:5.6) (56:1) (28:1) (1.4:1) (1:1.4)
Flash ratios of A:C and B:C cannot be set.
After you set the flash ratio and the flash ratio bar is displayed, you can still change the
A:B flash ratio with the < + > and < — > buttons
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