First colour DSO! M31, Lum + OIII + Ha

[Stratis]

My first attempt at a colour-synthesised DSO. My LRGBs still havent arrived so I'm stuck with narrowband:

This is 10x300sec Luminance, 10x600sec Ha (7nm) and 10x600sec OIII (13nm)

• 115mm TS Photo-Line triplet APO
• Baader Ha, Astronomik OIII filters
• QSI 583wsg
• Lodestar autoguider

I'm using Luminance as the green channel and multiplying the other two to compensate, producing a pseudo-RGB image...

Would someone with experience please advise me how to blend RGB with the Luminance data? I am using AstroArt Trichromy which can align the RGB channels but I have no idea how to use Luminance data. 

[wuthton]

I use Pixinsight, it's worth the cost for it's Dynamic Background Extraction tool (DBE) alone. For LRGB Harry Page says it best:

Harry's Astro Shed

[Stratis]

I use Pixinsight, it's worth the cost for it's Dynamic Background Extraction tool (DBE) alone. For LRGB Harry Page says it best:

Harry's Astro Shed

Thank you so much!! That is precisely, precisely what I was missing. Chroma noise reduction and proper combination.

Thank you, I will buy PixInsight right now.

[laudropb]

Nice first attempt.