wireless flash on NEX 7

Started Feb 9, 2013 | Discussions thread
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macsoft3
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wireless flash on NEX 7
Feb 9, 2013

OK so i know you have to have the little HVL-F20AM Flash to trigger other flashes wireless with TTL.

But is this trigger optical? or RF? does the onecamera HVL-F20AM has to flash?doesn'th that introduces light where you possibly dont want it?

thanks

Sony Alpha NEX-7
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