FYI - I was "playing around" and put the following article together. I did not do a literature search although am quite sure this is not original - although at the level of improvisation decribed it just might be! Anyway, here is some more reading material and any suggestions for improvement would be much welcome! Reflected Ultraviolet Digital Photography with improvised UV image converter http://www.rit.edu/~andpph/text-reflected-uv.html regards, andy (PS: not spell or grammar checked yet!)