A Spot Exposure Meter Designed for Color Photography

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: The use of handheld spot-photometers and through-the-lens (TTL) exposure measuring devices built into professional still-photography and motion-picture cameras seems to indicate that reflected light measurement techniques tend to win out in the lively, usually friendly and often enlightening controversy1 between the supporters of incident light measurement and those in favor of reflected light measurement. An analysis of both methods of exposure determination is made. Present-day reflected-light exposure meters are not adapted to the measuring of light reflected by colored objects. They do not respond in the same way as do color-photographic materials. This discrepancy, due the use of a single spectral overall response instead of three spectrally selective responses, leads to important errors in exposure indication and scene contrast determination, especially when employing narrow-angle reflected-light spot photometers. A spot exposure meter having three light sensitive elements with responses similar to those of the three emulsion layers of a color film is described.
Publication Date: 1977-10-01
DOI: 10.5594/J06737
Link: https://doi.org/10.5594/J06737
Author(s): K. Staes

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K. Staes; A Spot Exposure Meter Designed for Color Photography, SMPTE Journal ( Volume: 86, Issue: 10, October 1977); SMPTE, 1977. Available at https://doi.org/10.5594/J06737

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K. Staes; A Spot Exposure Meter Designed for Color Photography, SMPTE Journal ( Volume: 86, Issue: 10, October 1977); SMPTE, 1977. Available at https://doi.org/10.5594/J06737

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K. Staes; A Spot Exposure Meter Designed for Color Photography, SMPTE Journal ( Volume: 86, Issue: 10, October 1977); SMPTE, 1977. Available at https://doi.org/10.5594/J06737

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<span class="citation">K. Staes; <cite>A Spot Exposure Meter Designed for Color Photography</cite>, SMPTE Journal ( Volume: 86, Issue: 10, October 1977); SMPTE, 1977. Available at <a href="https://doi.org/10.5594/J06737" target="_blank" rel="noopener">https://doi.org/10.5594/J06737</a></span>

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K. Staes; A Spot Exposure Meter Designed for Color Photography, SMPTE Journal ( Volume: 86, Issue: 10, October 1977); SMPTE, 1977
doi: 10.5594/J06737
url: https://doi.org/10.5594/J06737

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<li>
K. Staes; <cite id="bib-10-5594-j06737">A Spot Exposure Meter Designed for Color Photography</cite>, SMPTE Journal ( Volume: 86, Issue: 10, October 1977); SMPTE, 1977
<span class="doi">10.5594/J06737</span>
</li>