Aperture - Optics. an opening, usually circular, that limits the quantity of lightthat can enter an optical instrument.
Shutter - a mechanical device for opening and closing the aperture of a camera lens toexpose film or the like.
Shutter - a mechanical device for opening and closing the aperture of a camera lens toexpose film or the like.
Exposure - the act of presenting a photosensitive surface to rays of light.
Depth Of Field - the range of distances along the axis of an optical instrument.
F-stop - the setting of an adjustable lens aperture.
Focal Length -the distance from a focal point of a lens.
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