Slow Sync or Rear Curtain

Slow sync or rear curtain flash is s flash mode that opens the shutter for a longer than normal period and fires the flash at the end of the exposure.

By default, your camera is set to front curtain, which means your flash fires at the beginning of the exposure, when the shutter opens. As mentioned above, rear curtain is getting your flash to fire at the end of your exposure, just before the shutter closes.

To understand the practical application of slow sync flash, view my in detph tutorial by taking the “Lighting Tutorials Course“.

March 15, 2015
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