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Thanks Greg. Yes, im aware of Ha/red blending, but haveing tried it recently on this, 3nm Ha subs are very different to regular red subs, they dont mix well, light pollution, and the emission/reflection neb mix might be a factor there on M20.
You have a good point there though, Im thinking of taking lum and adding it to the red, and using it to extend the reflection nebula, whilst leaving the core largely Ha to retain the detail.
Although 3m Ha gives an amazing result, it is difficult to blend with RGB, especially the stars which are tiny compared to RGB.
A short exposure LRGB just for the stars is an excellent idea, haddent thought of that. Come to think of it Greg, its all falling into place now, top input, thanks for that.
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