In article <4ao80b$ro0@netnews.upenn.edu>, derrick@dolphin.upenn.edu says...
>I am trying to take pictures of x-rays from a light box. Someone had
>told me that I need to use a color corrected light box, or else the
>pictures will come out too green. Does anyone knows if I can use a >color filter instead of buying a color corrected light box, which costs
>somewhere around $90? Many thanks in advance!

If you are shooting color negatives, forget the filter - just advise
the printer to make the images neutral in color (or use B & W film
for prints [XP2 can be processed and printed by color labs if a B & W
lab isn't available]). If you are shooting slides, try a cc30 magenta
to start (using a set of color printing filters for tests is much
cheaper than Kodak cc gels - when you know the correct filter values,
order the cc gels for the actual shooting, since they are much better
optically for shooting through).
Hope this helps.