Canon 0585C006 Instruction Manual page 47

Wireless Multiple Flash Shooting
You can divide the receiver units into two or three groups and perform
E-TTL II/E-TTL autoflash shooting while changing the flash ratio (flash
output rate).
In addition, you can set and shoot in a different flash mode for each
firing group with up to 5 groups (p.48).
Autoflash Shooting with Receiver Groups

A
2 (A, B) groups
Before shooting, perform a test flash (p.18) and test shooting.

The transmission distance may be shorter depending on the conditions

such as the positioning of receiver units, the surrounding environment,
and weather conditions.
' Radio Transmission Wireless Flash Shooting
A
B
(p.59)
C
3 (A, B, C) groups
B
(p.60)
47