Canon Speedlite 600EX-RT - Manual (Page 78)

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Using a Canon Speedlite (master/slave) with an optical transmission
wireless shooting function makes it easy to shoot with advanced
wireless multiple flash lighting, in the same way as normal E-TTL II/E-
TTL autoflash shooting.
The system is designed so that the settings of the 600EX-RT/600EX
attached to the camera (master) are automatically reflected on the
Speedlite that is wirelessly controlled (slave). Therefore, you do not
need to operate the slave unit while shooting.
The basic preparations for shooting are shown below. You can then
perform wireless E-TTL II/E-TTL autoflash shooting just by setting the
master unit to .
Autoflash Shooting Using One Slave Unit
(p.81)
:Optical Transmission Wireless Flash Shooting
Positioning and Operation Range (Example of wireless flash shooting)
x
M
Approx. 80°
Approx.
10 m
(32.8 ft.)
Approx.
15 m
(49.2 ft.)
Approx. 8 m
(26.2 ft.)
Approx. 12 m
(39.4 ft.)
Indoors
Outdoors
Transmission distance
Position the slave unit using the supplied mini stand (p.11).
Use the horizontal bounce function (p.27) and point the sensor of the
slave unit toward the master unit.
When shooting indoors, because the transmission signal is reflected off the
walls, operation may be possible even with slightly imprecise positioning.
COP
Y