Thank you Colin and Marcus. I acquire my images using MaxIm V6, stack my images in the old faithful Deep Sky Stacker so all channels are aligned and have not had an issue with this method except for my horsehead that wouldn't align my hydrogen alpha. For processing it is photoshop CC from the cloud with everything. If you could briefly outline a process that would be wonderful. I do know how to use masks, invert them as well as the other basics. Still sooooo much to learn.
Thanks
Mark
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