hello all---thanks for the compliments relic,but in all honesty i feel i'm "technically challenged"and can't fully explain the changes in the colours---most of my pictures(and those taken at doctor waynes) were taken using a digital camera on automatic focus without a flash or artificial lighting---i use a tripod as much as possible---overhead lighting,distance from the item being taken,angles of the shots would all have an effect i would think---if you're using a digital camera,take lots of shots and keep the best ones,it's a matter of trial and error---thanks again,nutbar