Transcription: Most cameras have a built-in light meter that works in conjunction with the camera's automatic exposure system. Light meters generate an f-stop and shutter speed that will render the area you're metering off of as a middle value that is visually between white and black, called 18% gray. This means that basing an exposure on white objects in a scene will cause the whites to be muddy and the rest of the scene to be overly dark. Basing an exposure on black objects in the scene will cause the black to have detail, but highlights in the scene to be overexposed. By basing an exposure on something in ...
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