Question about Canon SPEEDLITE 580EX TTL Flash
I have a canon 40D and a speedlite 580. I am trying to set the second curtain sync but the button only toggles on and off the high speed sync. Ideas why?
If you are not in P, AV, TV or M then the camera will not allow that feature. The picture modes disable many higher, more sophistocated features.
Posted on Feb 28, 2010
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Posted on Jan 02, 2017
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