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Master Unit Flash ON/OFF
You can switch ON or OFF the "Master" unit flash that is controlling the
wireless "Slave" units. When Master flash is ON, it will flash as group A.
For more detailed information on this feature see description under
2.4GHz Radio control (Page 23 )
• Even if the master unit flash firing is disabled, it still fires a preflash to
transmit wireless signals
Setting the optical Communication Channel
The Modus 600RT has four optical communication channels. The
master and the speedlights must be set to the same channel.
Master
• Press function button 4 until <
• Press function button 1 <
set the required channel
• Press set to lock selection
• Press function button 4 to return to <
Slave
• Press function button 4 <
set the required channel
• The channel must be set the same as the master speedlight
ETTL Fully Automatic Wireless Flash
Shooting
Using Automatic Wireless Flash with a Single Slave Unit
• For more detailed information on this feature see description under
2.4GHz Radio control (Page 29)
• The Viper TTL transmitter cannot be used for optical control
• All Master / Slave speedlights must be set to the same Optical channel
• Optical range is much shorter than radio range
Modus 600RT
> is displayed
MENU3
> and use the select dial to
CH
>
MENU1
CH
> and use the select dial to
33