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Another important quality of color film stock in particular is its color balance, which is defined by the color temperature at which it accurately records white.
Tungsten lighting is defined at 3200 K, which is considered " warmer " in tone and shifted towards orange ; daylight is defined at 5600 K, which is considered " colder " and shifted towards blue.
This means that unfiltered tungsten stock will look normal shot under tungsten lights, but blue if shot during daylight.
Conversely, daylight stock shot in daylight will look normal, but orange if shot under tungsten lights.
Color temperature issues such as these can be compensated for by other factors such as lens filters and color gels placed in front of the lights.
The color temperature of a film stock is generally indicated next to the film speed number-e. g.
500T stock is color film stock with an ASA of 500 and balanced for tungsten light ; 250D would have an ASA of 250 and be balanced for daylight.

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