Canon 550EX manual Press the button to register the flash ratio

Wireless E-TTL Autoflash With Flash Ratio ON

5 Press the < > 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.

6 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

< > button again.

•The flash ratios corresponding to the positions on the flash ratio scale are shown below.

(5.6:1) (2.8:1) (1.4:1) (1:1.4) (1:2.8) (1:5.6)

• 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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