Canon Speedlite 600 EX-RT User Manual (en, zh)

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You can divide the slave units into two 
firing groups, A and B, and adjust the 
lighting balance (flash ratio) for shooting.
The exposure is controlled automatically 
so that the total flash output of firing 
groups A and B results in the standard 
exposure.
 1
Set the firing group of the slave 
units.
 
Operate and set the slave units one 
by one.
 
While <M> is displayed, press 
function button 3 <F> and select 
<4> or <5>.
 
Set one unit to <4> and set the 
other to <
5>.
2
Display <N>.
 
The operations in steps 2 to 4 are set 
on the master unit.
 
Press function button 4 on the master 
unit to display <N>.
3
Set to <%>.
 
Press function button 2 <T> and 
set to <%>.
a: Wireless Multiple Flash Shooting with Flash Ratio
Autoflash Shooting with Two Slave Groups
A
B
COP
Y