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

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50
' Radio Transmission Wireless Flash Shooting
 
Shooting with a Different Flash Mode set for Each Group 
(p.65)
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.
*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.)
Difference between Radio Transmission and Optical Transmission
Function
Radio Transmission Optical Transmission
Transmission distance
Approx. 30 m (98.4 ft.)
Approx. 15 m (49.2 ft.) 
(indoors)
Firing group control
Up to 5 groups*
1
(A/B/C/D/E)
Up to 3 groups
(A/B/C)
Slave unit control
Up to 15 units
No restriction
Channel
Auto, Ch. 1 - 15
Ch. 1 - 4
Wireless radio ID
0000 - 9999
Operations 
from slave 
unit
Test flash firing
Modeling flash
*
2
Release
*
3
A
B
C
E
D
Manual flash
Manual flash
Auto external
flash metering
E-TTL II
Manual flash
* The flash mode settings are 
indicated only as an example.
Ceiling
COP
Y