Why can%26#39;t they be full color or simply black and white?
Answer:
You%26#39;re probably referring to indoor color cameras. If that is the case, the answer is simple. Cheap cameras. Better personal video camcorders have a circuit called auto white balance (AWB) which compensates for different lighting sources. Most indoor lights are flourescent (bluish) and most CCTV cameras don%26#39;t bother compensating for this. Take them outdoors into the sun, and they%26#39;re fine. You and I don%26#39;t notice this difference in color because of this miracle we call a brain that compensates for lots of things. The image on your retina being upside down, for one.
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