Canon Speedlite 600EX-RT Instruction Manual page 12

Nomenclature
Radio transmission wireless shooting/optical transmission
wireless shooting
Master unit
k
: Sync speed warning
(radio transmission)
, : Flash ratio
Flash mode
[ : Group flash
(radio
transmission)
g
: Master flash
firing ON
d
: Master flash
firing OFF
Firing group
Slave unit
h
: Slave icon
Linked shooting
:
Linked shooting
10
(p.47/75)
(p.70)
M : Master
' : Radio transmission
wireless shooting
: : Optical transmission
wireless shooting
: Channel
*
) : Channel automatic
setting (radio
transmission)
Q : Slave flash ready
(radio transmission)
Flash ratio
x : Slave
Individual slave (optical
transmission)
x : Slave
M : Master
: