![]() All major film manufacturers have one or several 3200 K films available in 35 mm transparency format. Likewise, using tungsten balanced films under daylight illumination will shift color tones towards a bluer cast. Using daylight balanced films under tungsten illumination will shift all color tones towards a decidedly yellow cast. ![]() ![]() These bulbs emit a wavelength spectrum centered in the 3200 K color temperature region and films color balanced for this type of illumination will produce the best results. Most light bulbs that are used for indoor illumination have some form of tungsten filament (with the exception of fluorescent bulbs). In the early morning and late evening, the color temperature will fall to 5000 K and lower causing color shifts in the emulsion resulting in warmer (redder) color rendering. The 5500 K average daylight color spectrum varies during different parts of the day. For instance, films intended to be used outside in ordinary daylight, fluorescent, and flash lighting are balanced during manufacture for a color temperature of 5500 K while films made for indoor tungsten light bulb use are balanced for a color temperature of 3200 to 3400 K. The concept of color temperature is very important in the photography arena, where film emulsions must be balanced to accurately render color using different light sources.
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