Canon Speedlite 600EX-RT Instruction Manual page 64

a: Wireless Multiple Flash Shooting with Flash Ratio
Autoflash Shooting with Three Slave Groups
C
A
62
Set the flash ratio.
4
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.
Take the picture.
5
The slave unit flashes 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".
Set firing group C.
B
1
Set the slave unit you want to add to
flash firing group <6> in the same
way as step 1 on the preceding page.
Set to <^>.
2
Set the master unit to
<^> in the same way
as steps 2 and 3 on the preceding
page.