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CMS-XML QuickGuide to Speedlite 600EX-RT Optical Wireless Flash Setup
2. Enable optical transmission on 600EX-RT receiver unit( s ). Press the Wireless Flash Button until the <OPTICAL TRANSMISSION> icon and <SLAVE> appear. You can combine one or more 600EX-RTs as optical-based receiver units with any combination of
CMS-XML QuickGuide to Speedlite 600EX-RT Radio Wireless Flash Setup
1. To set the sender unit: Press the Wireless Flash Button until the RT icon (upper-right corner of the unit’s LCD screen) and <MASTER> appear. The wireless flash cycle via button is: Conventional on-camera flash > Radio-based Master unit > Radio-based Slave unit > Optical-based Master unit > Optical based Slave unit. 2. To set the receiver unit( s ): Press the Wireless Flash Button until the RT icon and <SLAVE> appear.