Term - Second curtain sync

Second curtain sync

A type of camera flash synchronisation, found on more sophisticated SLR cameras, that fires the flash just before the second shutter blind closes. It’s used with slow shutter speeds to photograph moving objects. As the movement will be blurred before the flash freezes the subject it appears with a trail behind it. Use normal front curtain sync and the trail will appear unnaturally in front of the subject, making it look as though it is moving backwards.

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