Canon Speedlite 550EX Instructions Manual page 69

ETT L Cl Zoom 2'imm
Wireless E·TIL Autoflash With Flash Ratio ON
10
Press the < SELISET
>
button 10
register the selling.
The flash ratio bar and
IltIiIiI
A : B :C
rema in displayed.
To change the flash exposure compensation
amount. repeat steps
8
to
10.
11
Follow the basic procedure for
wireless E-TIL autoflash on page 60
and take the picture.
Even
n
you have slave units
A. B,
and
C,
if only
IIEIIIiI
A:B
is selected, slave unit
C
will
not
fire.
H slave unit C ls used to illuminate the subject directly, overexposure may resuR .
• Slave Groups
A Slave Group
Multiple slave units having the same
slave 1 0 will be recognized and
controlled as one slave group. The group
will be treated as one slave unit.
tn the lell ligure, lhe slave 10 is A fo r al l three
slave units. They will be conlrolled as slave unit A
even as a group .
69