 BetterPhoto Member |
Flash Synch Can you explain the flash synch rating?
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Bob Cammarata |
A camera's flash sync is the fastest shutter speed allowable, when using flash as the primary source of illumination. Typically, with film cameras, this "sync speed" ranges somewhere between 1/90 and 1/250 second. What this means is that the shutter is open the entire time that the flash burst occurs. Obviously, the faster sync speeds are the most effective for freezing fast action. If you were to select a shutter speed faster than your camera's flash sync capabilities, the result would be that a portion (or all) of the frame would under-expose ... or black out. You can, of course, shoot with flash at any slower speed, up to the sync speed but some motion of the action will be evident on the film, as ambient light will capture whatever movement occurs before (or after) the flash fires.
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