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Thanks for all the comments guys, I really appreciate it.
I have blended the Ha with the Red channel, normalised the three colours and combined in CCDStack. Saved as tif and touched up in PS.
If I try to blend in the Ha as luminance I always get the same salmon pink as the nebulosity colour. This looks better, but is it more correct?
There's a really good article on this somewhere, but I can't find it ATM.
Anyway, here's the reprocessed version.
Cheers
Stuart
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