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Speedlites, Printers, Accessories / Can 600EX-RT Be Used As Optical Slave With Elinchrom Like Nikon SB900 In SU-4

« on: January 12, 2013, 07:25:35 AM »

I'm a newbie with Canon and used to use the Nikon SB900 flashes in SU-4 mode which makes them a manual, optical slave that would fire when any studio flash went off.  Im trying to do the same with the Canon RT600EX but can't find a way for them to fire completely independent of the camera / ST-E3 controller.  Any advise would be much appreciated.