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Definition of Term

  • An opening that changes in size to control the amount of light passing through the lens of the camera.

Study Guide Resources

  • The size of the APERTURE is measured in F-STOPS
    • Small number = Big Opening = Allows in more light = Less time required for correct exposure = shallow depth of field.
    • Big number = Small Opening = Reduces amount of light in = More time required for the same exposure = wider depth of field.
  • Aperture, how wide or narrow the opening is determined by the lens, not the camera
  • Try out this interactive animation which shows the relationship between the size of the aperture opening and the f/stop used to measure the aperture setting:

YouTube Video