Canon Speedlite 600EX II-RT Manual (en)

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75
5
: Wireless Multiple-Flash Photography with 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 procedure is the same 
as “Autoflash Photography with Two 
Slave Groups” (p.73).
1
Set the slave unit to firing group 
C.
 
Set the slave unit you want to add to 
flash firing group <h> in the same 
way as step 1 on page 73.
2
Set the master unit to <u
<
h>.
 
Set master firing group control to 
<u> <h> in the same way as 
step 2 on page 73.
3
Set the A:B flash ratio.
 
Set the A:B flash ratio in the same 
way as step 3 on the preceding page.
Autoflash Photography with Three Slave Groups
C
A
B