What is interesting about this is that the E640 is a IGBT controlled monolight and the Speedlites that interfere with the PW Control TL devices are IGBT as well.
Wonder why that was not a problem with earlier PW triggers and Speedlites? Since the PWs are all using the same freq and the Canon 580EXs have apparently been high emitters for some time.
As for source for longer cables try Flash Zebra
Apr 27, 2010 at 09:15 AM
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