I'm not sure about the green feel Greg - I ran this through SCRN in PI a couple of times with the same feeling. I wonder if its an illusion from all the red in there.
This was my first time using PI's Photometriccolourcal script that does white/colour cal balancing against calalogued stars in the frame based on plate solving. I'm normally inclined to push the blue a bit more, but the overall tone is pretty much what came out of that process.
Ha blends are a bit of a dark art though, and H2 beta is supposed to warrant some blue channel contribution from the Ha.
This was done using the Pixinsight NBRGB combination script by the way. Thanks for thoughts Greg - I'll have to check the histogram again.
Quote:
Originally Posted by gregbradley
Ha LRGB blends are tricky. Your Ha colour seems fine but the background seems to lack other colours. I think I see a touch of green in the background. I get this a lot. It comes from airglow which is often green and shows up in digital camera images. I didn't know how common it was until I started doing a lot of nightscapes and I see it all the time. Sometimes its ridiculously strong.
Excess green is easily gotten rid of though with SCNR in Pixinsight or its Photoshop brother HLVG free plug in.
Then push the blues a tad more. How did you blend the Ha? I don't think anything beats lighten mode.
Greg.
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