Aperture: is an opening hole or gap
Shutter: is a device that opens and closes to expose the film in a camera
Depth of Field: is the distance between the nearest & the furthest objects that give an image to be focused on the camera
F-Stop: it regulates how much light is allowed through the lens by varying the area of the hole the light comes through
Focus Length: the distance between the center of a lens or curved mirror & its focused
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