StarTools

For the first time I have tried to integrate LRGB+Ha+SII+OII into one image. I have spent numerous hours trying to get a descent looking result, and I know there is no right or wrong doing this, it's a matter of taste, but I still would like to hear how others would be doing this. Each color have one hour of data. This is the process I ended up with (the 7th time I tried). (And yes, I have read the manual).
I restacked Ha and SII into one dataset and used this as my NBaccent file. I does not look like ST is able to discern between Ha and SII color. Is that correct? This also gave me lower noise as I had twice the imaging time into one image.
I processed this as any other LRGB set, then added the NBaccent data at the end. Here we can choose between Ha/SII Bright red and Ha/SII Balmer series. I chose the Bright red and adjusted the brightness and color until I liked the result. Removed noise and saved it.
Then I wanted to add the OIII data. I could not find a way to use the NBaccent this time so I went with the previous way of doing it, processing the image as mono chrome, the take it into the compose module to add color to it. I found the I could make it dark blue (RGB/RGB) or I could choose L + syndetic L from RGB (Bi-color) which gave me a bright blue/green color which probably was not that far from OII. Still, I went with the dark blue and added this to the existing image using the Layer module. (I will try again with the other option).
I know there is many ways to skin a cat, and I would tike to hear which way others would do it, including Ivo if you can take the time. This is my final result.

Hi Heno,
Your result looks pretty nice!
I'd say try to load O-III as G and combined stack with Ha/S2 as R and create an artificial Duoband NBA stack this way.Save linear and reload as NBA Compose/NBA will split this into red &green channels automatically . in NBA there are settings for Duoband filters which you could use to render bright red &cyan, or pink & green for example. To Your question: no, NBA will treat both Ha an S2 as red inputs, hence does not distinguish between those, neither between H-beta and O3. (Both rendered as G or G&B=cyan)
Hope this helps,
Jochen

Jochen
Thank you so much.
I never thought about doing it the way you describe, but I will certainly try it out at first opportunity.

hixx wrote: ↑Wed Feb 02, 2022 12:34 pm I'd say try to load O-III as G and combined stack with Ha/S2 as R and create an artificial Duoband NBA stack this way.Save linear

So I load OIII and G in compose module, keep and then just save? Is that what you mean when you say "save linear"? Likewise for Ha/SII + R.

Helge