af assist on canon flash 580exii not working my canon flash 580 exii does not fire the ir beam needed to assist af in low light condition , all setting ok on camera which is canon rebel 450d check ...
...af-1 and a Nikon d90. Flash will not fire! zoom works everything else is ok. Pushing test button and no flash! Is this a bust unit? Hi, Bad news for you. Try this. put new batteries in flash. turn ...
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