Brief but useful overview of White Balance and digital cameras. Shows some examples of what can happen when the white balance isn’t set correctly.
This is one reason I like shooting in RAW format. The white balance isn’t set until I process the images on my computer, so I can set the white balance then. Obviously it would be best to manually set the white balance everytime I change locations, but in real life for the average person, this isn’t practical.
Also, based on a number of reports, Auto is very good outdoors, but doesn’t work very well indoors. So, if you remember, it’s a good idea to manually calibrate the white balance indoors if you aren’t shooting in RAW format.