Canon 550EX manual Slave Groups, 10Press the button to register the setting

Wireless E-TTL Autoflash With Flash Ratio ON

10Press the < > button to register the setting.

• The flash ratio bar and A:B:C remain displayed.

• To change the flash exposure compensation amount, repeat steps 8 to 10.

11Follow the basic procedure for wireless E-TTL autoflash on page 60 and take the picture.

•Even if you have slave units A, B, and C, if only A:B is selected, slave unit C will not fire.

•If slave unit C is used to illuminate the subject directly, overexposure may result.

●Slave Groups

A Slave Group

ID=AID=AID=A

Multiple slave units having the same slave ID will be recognized and controlled as one slave group. The group will be treated as one slave unit.

•In the left figure, the slave ID is A for all three slave units. They will be controlled as slave unit A even as a group.

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