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

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77
:Optical Transmission Wireless Flash Shooting
You can divide the slave units into two or three groups and perform 
E-TTL II/E-TTL autoflash shooting while changing the flash ratio 
(factor).
 
Autoflash Shooting with Two Slave Groups 
(p.85)
 
Autoflash Shooting with Three Slave Groups 
(p.86)
Wireless Multiple Flash Shooting
B
A
B
A
C
 
Before shooting, perform a test flash (p.16) and test shooting.
 
To avoid interfering with transmission, do not place any obstacles 
between the master unit and slave units.
COP
Y