Given the current heat wave affecting my area, seemed topical.


And I quote;

"Dealing with Mixed Lighting

What if you were presented with a scene which is lit by two light sources of different temperatures, such as when you need to take a picture of an interior lit by tungsten, but with a window which shows an exterior lit by sunlight, and need both to appear correctly?

Well, in the days of film photography, there was only one real option, and that is to adjust the color temperature of the light source that you can most easily manipulate. In the case mentioned above, you would cover the tungsten light with a sheet of blue plastic to filter out the yellow rays and effectively raise the color temperature of the tungsten light to match that of the light outside.

In digital photography this approach will still work, but you also have two other methods.

First, you could take two exposures, one with the white balance set for daylight, and the other for tungsten, and then combine these in Photoshop.

Second, you could take one exposure, make sure it is in RAW, then open the file once and adjust it for daylight, and save it under a different name, then open the original RAW image again, and adjust it for tungsten, and again save it under a different name. Now open both saved images and combine them as you did in the first method.

This second method has the advantages that you do not need a tripod to keep the camera still between exposures and that you can even use it on fast moving subjects, because you do not need to identical images."

Full article can be found at Illustrated Photography.com ... here.


More in-depth.. "Color Temperature and Color Correction in Photography".

Thanks for this one.