This is the result of using for the first time the dual narrow-band Optolong L-enhance filter and ZWO ASI 294MC PRO camera.
Even for not much of integration time, just less than 3 hours, still got a pretty detailed image in the end.
The best result I got with the following technics and options for the obtained data:
1. WBPP, linear fit clipping, bilinear debayer method, local normalization, separate channels
2. Drizzle 2x each channel, square function, drop shrink 0.5
3. Combine channeld to RGB
4. DBE with Division correction
5. BXT only correct
6. SPCC
7. BXT, manuly set psf to the mean psf of the image
8. SXT to extract stars and proceed with stretching separetely
9. Prepare separate HOO version
10. NXT with some more stretching after
11. Play with Curves a bit
12. Integrate with stretched stars
To create the HOO version I used the technic described by Dark Sky Geek:
https://www.youtube.com/watch?v=Ie5tzJ8EtZQhttps://www.youtube.com/watch?v=19nKeFPu38sIf anyone would need it, the formulas for extracting Halfa and OIII channels for the combination ZWO ASI294MC PRO and Optolong L-enhance:
OIII = (2*0.92*(G-0.13*R)/0.88 + 0.5*(B-0.05*R)/0.48)/2.34
Halfa = (R-OIII*0.13)/0.9
Combine them as RGB image:
Halfa -> R
0.9*OIII + 0.1*Halfa -> G
OIII -> B
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