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...I noticed that there is TTL written on flash unit. Now, I'm at home and try to reproduce the behavior, but now I see ETTL...
Was the 580EX mounted on a camera at the time? If I recall correctly, that kind of problem can happen if the flash isn't firmly seated in the hot shoe, if the contacts on the flash foot or camera shoe are dirty, or if there is a loose connection in either the foot or the shoe. The flash essentially thinks it's mounted to an older camera model that doesn't support ETTL.
Edited on Jun 16, 2013 at 01:39 AM · View previous versions