Aperture-Is a hole or an opening through which light travels.
Shutter- is what controls the length of time that the light hits the recording surface.
Exposure- the total amount of light allowed to fall on the photographic medium during the process of taking a photograph
Depth of field- is the portion of a scene that appears acceptably sharp in the image
F-stop-of an optical system expresses the diameter of the entrance pupil in terms of the focal length of the lens
Focal length-is a measure of how strongly the system focuses or defocuses light.
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