expo-sure meter

exposure meter

noun Photography.
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.
Also called light meter.


Origin:
1890–95

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World English Dictionary
exposure meter
 
n
photog Also called: light meter an instrument for measuring the intensity of light, usually by means of a photocell, so that the suitable camera settings of shutter speed and f-number (or lens aperture) can be determined

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