Canon Speedlite Transmitter ST-E3-RT Manual

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a: Wireless Multiple Flash Shooting with Flash Ratio
4
Set the flash ratio.
 
Press function button 3 <
F>.
 
Press function button 3 <
A>.
 
Turn <
9> to set the flash ratio, and 
press the <
8> button.
 
Press function button 4 <
?> to 
return to the shooting-ready state.
5
Take the picture.
X
The slave units flash at the set flash 
ratio.
You can add firing group C to firing 
groups A and B. C is convenient to set 
lighting so as to eliminate the subject’s 
shadow.
The basic setting method is the same as 
“Autoflash Shooting with Two Slave 
Groups”.
 1
Set a flash as firing group C.
 
For the slave unit settings, see the 
flash’s instruction manual.
2
Set to <
^>.
 
Set the master unit to 
<
^> in the same way 
as steps 2 and 3 on the preceding 
page.
Autoflash Shooting with Three Slave Groups
COP
Y