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600 EX-RT radio problems

bruceplotkin
Apprentice

I've been having problems while shooting weddings with my 600EX-RT flashes not firing as slaves (radio mode) consistently. I've talked with CPS and we ran through all the possible issues including channel changing but other than trying to upgrade to the newer flash version we can't seem to come up with a solution. The master-slave firing works fine in my office but when at an event the slaves might start off firing but then stop working, even as I move closer to them with the master. Again I've tested out looking for the strongest channel and changing them accordingly. My other photographer, ,using the Chinese versions, has no problems. This has happened  multiple times/. Wondering if anyone else experiences this.

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