Ash (p.13), Radio transmission: linked shooting, Radio transmission wireless: master unit – Canon Speedlite 430EX III-RT User Manual
Page 13: Radio/optical transmission wireless: slave unit

13
Nomenclature
Radio transmission wireless: Master unit
(430EX III-RT only)
Radio/Optical transmission wireless: Slave unit
Radio Transmission Wireless Shooting/
Optical Transmission Wireless Shooting
Radio Transmission: Linked Shooting
(430EX III-RT only/p.67)
M
: Master setting
Flash ratio
Firing group control
Wireless radio ID
Slave flash ready
Flash mode
a
: E-TTL II/E-TTL
autoflash
q
: Manual flash
[
: Group flash
'
: Radio transmission wireless shooting
k
: Sync speed
warning
g
: Master flash
firing ON
d
: Master flash
firing OFF
)
: Transmission
channel
automatic
setting
*
:
Transmission
channel
G
: Master unit/
Slave
unit
charge
status
h
: Slave icon
Firing group
'
: Radio
transmission
wireless
shooting
:
: Optical
transmission
wireless
shooting
N
: Test flash
(
'
only)
L
: Remote release
(
'
only)
M
: Modeling flash
(
'
only)
x
: Slave setting
(
:
Individual slave (
:
only)
b
:
Linked shooting
M
: Master setting
x
: Slave setting
L
: Release