For a perfect negative or slide, correct exposure is a must. This can be achieved only when an exact amount of light (necessary to produce negatives with right density and color transparencies with pleasing colors) is allowed on the film through the lens of a camera. Overexposure (caused by admission of too much light) produces negatives that are too black and dense and transparencies that are pale and washed out.
[...] Exposure Control Today, most point-and-shoot cameras take their own decisions on exposure problem and life is easy for the user. They use an exposure system found in most advanced SLR cameras, called a program mode. In this mode, these simple cameras evaluate the amount of light in a scene and set the best combination of aperture and shutter speed. Some of these cameras are so good that many professional photographers carry them as a ‘standby', just in case their main camera fails for some reason. [...]
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