Canon Speedlite 600EX II-RT Manual (en)

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14
Nomenclature
 
Master unit
Radio Transmission Wireless Shooting/
Optical Transmission Wireless Shooting
M : Master setting
Flash ratio
Firing group control
Firing group control
, : Flash ratio
' : 
Radio 
transmission 
wireless shooting
: : Optical transmission 
wireless shooting
Q : Slave flash ready 
(
' only)
Flash mode
a : E-TTL II/E-TTL 
autoflash
q : Manual flash
[ : Group flash (' only)
G : Master unit/Slave unit 
charge status
g
 :  Master flash 
firing ON
d
 : Master flash 
firing OFF
Flash mode for each 
group (
[ only)
* : 
Transmission 
channel
) :  Transmission 
channel automatic 
setting (
' only)
Master/slave flash 
not ready
Firing group charge 
status (
[ only)
 : Flash not ready
 : Flash ready
k
 : Sync speed warning (
' only)
During radio transmission wireless shooting, when the master unit and slave 
unit are fully charged, <G> disappears. Also, during <[> flash 
photography, when all flash units are fully charged, the “firing group charge 
status” indication also disappears.