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Friday, September 2, 2011

The Camera

Aperture: a hole or an opening through which light travels.

Shutter: a device that allows light to pass for a determined period of time, for the purpose of exposing photographic film or a light-sensitive electronic sensor to light to capture a permanent image of a scene.

Exposure: controls the amount of light that enters the camera during a period of time.

Depth of field: the distance between the nearest and farthest objects in a scene that appear acceptably sharp in an image.

F-stop:  the focal length divided by the "effective" aperture diameter.

Focal length: a measure of how strongly the system converges (focuses) or diverges (defocuses) light.


Lens: captures the light from the subject and brings it to a focus on the film or detector.

Focus: only objects within a limited range of distances from the camera will be reproduced clearly. The process of adjusting this range is known as changing the camera's focus.

 Flash: a device used to produce a flash of artificial light.

Camera: a device that records and stores images.














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