Aperture - refers to the diameter of the aperture stop rather than the physical stop or the opening itself.
Shutter - is a device that allows light to pass for a determined period of time on to film.
Exposure - the measurement of light and dark in a given subject.
Depth of Field - the distance between the nearest and farthest objects in a scene that is acceptably sharp.
F-Stop - the number of stops that can adjust the lens aperture.
Focal length - the distance in millimeters from the optical center of a lens to the to the imaging sensor when the lens is focused at infinity.
1. Lens release button - releases the lens for maintenance or to switch it out
2. Menu button - takes the user to a menu with different options for use
3. Settings button - takes the user to a menu that allows the user to change settings to their liking
4. Erase button - erases the given file/picture when selected
5. Magnify button - can be used to give magnification when needed
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