Canon 550EX Camera Accessories User Manual


 
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.
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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.
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