Flash Sync speed refers to the fastest speed at which the shutter can be set to ensure that the film receives enough light from the camera's flash.while the flash sync speed can be set slower,setting it faster means that the shutter will close before the film has received enough light.
In simple terms,the flash sync (short of synchronized) speed coordinates the snap of the flash with the opening and closing of the camera's shutter.
Consequetly,faster flash sync speed will produce pictures that are underexposed,making them darker and less defined than picture produced when the appropriate flash sync speed is used.
The proper flash sync speed depends on the amount of flash needed to take a particular picture.as a result,scenes that need more flash will require slower flash speeds to ensure that enough light enters through the camera's lens.
Conversely,scenes that are better lit demands less flash and,therefore,can be adequately photographed at a faster flash sync speed.be sure to know what the upper limit foe the speed should be before taking your picture.if the speeds is set faster than the scene demands,you will end up with dark,blurry pictures.
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