Abstract
Photographic exposure meters may be used to take reasonably accurate photometric measurements for laboratory purposes if corrections for deviations of the photosensitive elements from the spectral response of CIE standard observer are made. A series of nomographs which directly convert exposure meter readings to log foot Lamberts are provided for the two most commonly available types of meter. These nomographs incorporate the required corrections for both source and cell characteristics.
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Coren, S., Miller, J. The use of photographic exposure meters as photometers. Behav. Res. Meth. & Instru. 5, 357–360 (1973). https://doi.org/10.3758/BF03200207
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DOI: https://doi.org/10.3758/BF03200207