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 wireles s

shooting using optical transmission, such as being l ess affected by

obstacles, and not having to point the slave unit’s wirele ss sensor toward

the master unit. The main functional differences are a s 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–
ABC
ED
Manual flash
Manual flash
Auto external
flash metering
E-TTL II
Manual flash
* The flash mode settings are
indicated only as an example.
Ceiling