COLOR TEMPERATURE

by Ted Peterson
This web site talks about what is color temperature in photography.
All items that glows give out light on what we call color temperature. That is any thing that glows give out a color. The sun, fluorescent lamp, incandescent lamp. The hotter the glow the more blue end shows. As the temperature is lower more red shows.
The tungsten lamps cannot have a color temperature more then about 4,000 as higher than that the tungsten would burn up. The sun can have a temperature of over 10,000.
In black and white pictures the color temperature will not come into effect, but in color pictures you have to make sure that your film is the correct film for the color temperature of your light source.
If you are taking most of your pictures indoor you will want to order indoor color film. This film thinks that you have more red color then you want so it will correct the picture by adding a little blue to the picture. If you are taking most of your pictures outdoor you would buy outdoor film, as it will add a little red to the picture to make up the extra blue showing.
As you can see using the wrong film you can not get the best pictures unless you can come up with something to correct the picture. On negative film the person doing the printing can correct the pictures but not in slide film.
There is another way to correct the color temperature and that is by the use of filters. You can get filters to use outdoor film indoor, and filters to use indoor film outdoor. These filters have a number. The 81 group are for lowering the color temperature (that is they are yellow). And the 82 group of filters are made to race the color temperature (bluish). The difference between A, B, C, D is about 100 degrees.
You can pick up a color temperature meter but they are hard to use and will cost a lot of money. Most people do not use them.
When you view a color print, you should use lights that have a color temperature of about 3800 K.
Remember, use the correct film for the work that you are doing. Tungsten for indoor or daylight for outdoor unless you are using negative film and the person printing the picture will correct your pictures for you.
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