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ISO 3028:1984
M00002099
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ISO 3028:1984 Photography -- Camera flash illuminants -- Determination of ISO spectral distribution index (ISO/SDI)
standard by International Organization for Standardization, 10/01/1984
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Specifies a method for calculating a spectral distribution index to evaluate the ability of expendable flash and electronic flash units to produce photographic colour results comparable with those obtained with daylight-type films exposed to daylight illumination.