Hi, I have been playing with Ha and LRGB blending. It is amazing the many different ways people use to do this. I have been playing with the different methods and I think I found one that works for me. Below is a link to Sharpless 157 (The Claw Nebula). Since this is a learning experience for me, comments and suggestions are welcome. http://www.azstarman.net/SH157.htm Bernard -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.