aperture-a device that controls amount of light admitted
shutter-a mechanical device on a camera that opens and closes to control the time of a photographic exposure
exposure- the condition of being presented to view
depth of field- is the portion of a scene that appears acceptably sharp in the image.
F-stop-A camera lens aperture setting that corresponds to an f-number.
focal length-the distance from a lens to its focus

Autofocus- Automatic focus in the camera.
Shutter Speed- It lets you control the speed of the shutter and how much light you want in the photo.
viewfinder- is what the photographer looks through to compose, and in many cases to focus, the picture
Rangefinder-s a device that measures distance from the observer to a target, for the purposes of surveying, determining focus in photography