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Cameras and photography A-Z

Aperture   An opening behind the lens of a camera. Its size can be adjusted to control how much light enters the camera.

Camera   A device that records an image of a scene electronically or on photographic film. The main features of a camera are a lens and a shutter. Light from a scene is let into the camera when the shutter opens. The lens focuses the light on to the back of the camera. In this way it makes a small copy of the scene called an image. The image is captured on a memory chip or on a strip of photographic film.

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