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correct exposure

The combination of aperture and shutter speed that yields a full-toned negative or slide that yields the best possible tonal representation of the scene onto film or sensor. The constants in an exposure calculation are the speed of the film and the brightness of the scene the variables are the aperture and shutter speed.

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correct exposure

that amount of light that makes an acceptably-good image without being over-exposed or under-exposed.
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correct exposure

The specific amount of light that must strike a given film to produce the best possible picture quality.
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