“I used 3 flash unites in 2 different flash groups, Group A + Group B. (Remember, this is TTL folks). Group A 1:1 and Group B 1:4. We had 1 Radiopopper transmitter attached to the ST-E2 and 3 Radiopopper receivers attached to 580 EX II’s. ”
Testing the Radiopopper at FlashFlavor.
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