Slave groups – Canon 550 EX User Manual

Page 69

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Wireless E-TTL Autoflash With Flash Ratio ON

Press 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.

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

Slave Groups

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.

69

A Slave Group

10

11

• 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.

05. F073-E (51~) 02.4.1 2:12 PM Page 69

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