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Old 01-04-2010, 09:57 AM
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BBenson BBenson is offline
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Join Date: Sep 2009
Location: Fort Worth, Texas
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Quote:
Originally Posted by OsmosisStudios View Post
Street lights burn orange. Very orange.
Well, there's lots of different street lights. The "orange" ones are sodium vapor lamps, which emit virtually all of their light at the sodium doublet (atomic transitions) wavelengths of 589+ nm and 590- nm, your eye can't tell the difference. Shooting photos under these means you are using essentially a monochromatic light source. White balance by itself helps a lot but isn't a full answer since different surfaces reflect different wavelengths in somewhat different manners, and there's a lot of solar wavelengths missing

The most popular other street light in the US tends to be the mercury vapor lamp, usually with color corrections via a phosphor. Uncorrected mercury vapor lamps emit mainly the mercury triplets which range roughly 360nm-435nm and appear blueish. The color corrected mercury lamps pump up the red end of the spectrum and have peak emissions running from about 250nm-575nm, which appears "more white" to the eye and the camera. White balance adjustments work better under mercury lamps than under sodium, IMHO

Bob
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