Canon 600EX-RT Instruction Manual page 52

' Radio Transmission Wireless Flash Shooting
Shooting with a Different Flash Mode set for Each Group
Auto external
flash metering
E-TTL II
Manual flash
Difference between Radio Transmission and Optical Transmission
Wireless shooting using radio transmission has advantages over wireless
shooting using optical transmission, such as being less affected by
obstacles, and not having to point the slave unit's wireless sensor toward
the master unit. The main functional differences are as follows.
Function
Transmission distance
Firing group control
Slave unit control
Channel
Wireless radio ID
Test flash firing
Operations
from slave Modeling flash
unit
Release
*1, *2 and *3: Some restrictions apply depending on the camera that you use.
(Refer to *1: p.51, 65; *2: p.67; and *3: p.68.)
50
E
A
B
Radio Transmission
Approx. 30 m (98.4 ft.)
Up to 5 groups*
(A/B/C/D/E)
Up to 15 units
Auto, Ch. 1 - 15
0000 - 9999
D
C
Manual flash
Manual flash
* The flash mode settings are
indicated only as an example.
Optical Transmission
Approx. 15 m (49.2 ft.)
1
Up to 3 groups
No restriction
2
*
3
*
(p.65)
Ceiling
(indoors)
(A/B/C)
Ch. 1 - 4
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