shutter speed

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shutter speed (plural shutter speeds)

  1. (photography) The duration of time for which the shutter of a camera remains open when exposing photographic film or other photosensitive material to light for the purpose of recording an image.
    • 1993, Charles Hagen, "CAMERA: For Film Exposure, Timing Is the Key," New York Times, 21 Nov. (retrieved 4 Apr. 2009):
      Shutter speeds are usually measured in seconds or fractions of a second, and are typically arranged in a sequence that includes 1, 1/2, 1/4, 1/8, 1/15, 1/30, 1/60, 1/125, 1/250 and 1/500.