Front and Rear Curtain Sync

All Canon EOS cameras have two moving curtains in the shutter mechanism. The front curtain opens the shutter, and the rear curtain closes it. The normal operation of the shutter and flash causes the flash to fire immediately when the front curtain opens. This is Front Curtain Sync, and it's fine for most general flash applications. But say your subject is moving and you're panning the camera by using a slow shutter speed to pick up some ambient light. Flash photography in this mode produces motion trails out in front of the object you're tracking to make it look like it's moving backward. The trick is to get the flash to fire right before the shutter closes, thereby showing the motion trails behind the object, and this is exactly what Rear Curtain Sync does. You can set this feature either on the camera or on the Speedlite, but the Speedlite takes precedence over the camera's settings.

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  • Tony Henderson
    How to set rear curtain sync on 5d mark 2?
    9 years ago
    Where is rear curtain sync on canon mark 2?
    9 years ago
  • lina
    How to secondcurtain sync canon 5d mark II?
    9 years ago
  • katja
    Where can I find the rear and front synk flash on my 5d mark ii?
    9 years ago
  • Asfaha Abel
    How to adjust rear curtain sync on canon 5d mark 2?
    7 years ago
  • sesto
    Where is front rear curtain on canon 1100d?
    6 years ago
  • sebastian
    How to setup rear curtain sync canon 5d mk iii?
    6 years ago
  • Jeffery
    How to rear stnc flash on mark 3?
    6 years ago

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