| an instrument for measuring the intensity of light in a certain place or upon a certain object, having an adjustable scale for determining the optimum relations of shutter speeds and stops at each intensity. |
exposure meter
photographic auxiliary device that measures the intensity of light and indicates proper exposure (i.e., the combination of aperture and shutter speed) for film of a specific sensitivity. Modern instruments are of two basic types: the self-generating, or photovoltaic, and the variable resistance, or photoconductive
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