November 2012
Intermediate to advanced
272 pages
8h 35m
English
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EXPOSURE THEORY
Light comes in both visible and invisible portions of the electromagnetic spectrum. Human eyes are sensitive to the small portion of that spectrum that includes the visible colors from the longest visible wavelengths of light (red) to the shortest wavelengths (blue).
Intensity of light is measured in foot-candles or in lux (in the metric system). A foot-candle (fc) equals about 10.08 lux (or, for a rough conversion, multiply foot-candles by 10 to get lux). A foot-candle is the light from a standard candle at a distance of one foot. One lux is the illumination produced by one standard candle from a distance of 1 meter. When a film ...