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DPChallenge Forums >> Hardware and Software >> The Sigma EF-500 DG flash as a slave?
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11/06/2004 07:18:32 AM · #1
Do you know if this flash can be triggered by a Canon 550ex flash or ST-E2 transmitter and how it performs, if there are any disadvangates to this over getting a 420ex or just another 550ex?

Message edited by author 2004-11-06 07:19:07.
11/06/2004 06:14:51 PM · #2
and *bump* you go...
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