Canon Speedlite 600EX-RT - Manual (Page 80)

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To perform optical transmission wireless shooting, set the master unit
and slave unit with the following procedure.
Display <:> and <M>.
Press the <I> button to display
<:> (optical transmission) and
<
M >.
Display <:> and <x>.
Operate and set the flash you want to
set as the slave unit.
Press the <I> button to display
<:> (optical transmission) and
<
x >.
To avoid interference with optical transmission wireless systems used
by other photographers, you can change the transmission channel. Set
the same channel for both the master unit and slave unit.
1
Press function button 4.
To set the master unit, press function
button 4 to display <O>.
To set the slave unit, press function
button 4 to display <N>.
Wireless Settings
Master Unit Setting
Slave Unit Setting
Transmission Channel Setting
To perform normal flash shooting, press the <I> button to clear the
wireless (master/slave) settings.
COP
Y