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CMS-XML QuickGuide to Speedlite 600EX-RT Optical Wireless Flash Setup
3. Speedlite 600EX-RTs used as receiver units in an evenpower set-up can be assigned to any group — A, B or C. (Groups D and E are not available in optical wireless mode.) 4 . Position the camera and receiver unit( s ) within the correct operating range (10 meters/33 feet indoors), and so that the flash sensors on the front of the receiver units (under the Canon logo) are pointed toward the master.
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.