Joe, Email the images to me and I will combine and process them for you. Or, if you have Photoshop, I can talk you through it. Let me know. Cheers, Tyler ____________________________ Joe said: <Many thanks, Tyler. I took a nice view of a galaxy and made the final print by first combining the colors, then making a final version. I'll go back and try it the other way. I can take a luminosity photo by using the "clear filter" option in my SBIG's color wheel. But I don't know how to combine it with the color data.>