Quote:
Originally Posted by gregbradley
Yes that does look great. Adding Ha as luminance normally damages colour so adding the RGB with the Ha helped with that eh?
Star colours are very good too.
Greg.
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Indeed... adding just Ha as a luminance layer totally buggers up the colour balance and brightness of the scene.
By summing all of the channels you are getting panchromatic + extended red data, which also gives you an extra level of dithering/noise reduction that CMOS really benefits from.
You can't use it as a 100% luminance layer, but at 50% it brings up the faint background stars without overly distorting the colour balance.
Also for the record...the centre of the Lagoon is not blue, it's red, but the H-beta emissions will give some Blue+ Red. i.e. magenta.