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Thanks Graeme, Jacob, Bo Marc & Geoff.
No, the image doesn't have much H-alpha. I tried to push the H-alpha but it didn't improve it. Maybe I'll try and separate the colour channels and redo it - I'll have to read that bit of the pixinsight book as I have onyl done OSC processing before. I've tried other regions with more intense H-alpha (NGC3324, NGC2070) and they have much stronger reds. Or maybe I just need more/longer subs.
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