Canon Speedlite 430EX III-RT - Manual (Page 47)

47
' Radio Transmission Wireless Flash Shooting
You can divide the slave 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 Slave Groups
Wireless Multiple Flash Shooting
A
B
A
B
C
2 (A, B) groups (p.59) 3 (A, B, C) groups (p.60)
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 slave units, the surrounding environment, and
weather conditions.