I recently saw an image by
@Michael Feigenbaum where he used
@Frank Breslawski's "crazy" pixmath HaOiii formula image:
https://www.astrobin.com/97xr41/Q/. I knew I had to find a target to try it out on. The Wizard is one of my favorites, is up early, so what the heck! In this I used my OSC camera with my new Antlia dual narrowband filter. It replaced my L-eXtreme...I find it slightly better being 5nm compared to 7nm. Makes a noticeable difference from my Bortle 7 backyard. Integrated in APP and used its extract Ha, Oiii routines. The pallet is definitely fun to work with. Gives lots of contrast to in the background. I did add RGB stars (using the Lpro filter). The stars proved to be by far the most difficult part of the processing as some halos and blowouts, even though 60sec subs. I found when I added the stars they took away from the beauty of the starless image. I was going to post a starless version, but ended up just reducing the heck out of the stars🤪.
SH2-142, The Wizard Nebula, is an active star forming region at a distance of 7,200 light years from Earth and has an apparent magnitude of 7.2. It has a radius of 100 light years and occupies 25 arc minutes of the apparent sky. It is a large, diffuse HII associated with the star cluster NGC7380. It is ionized by the binary star DH Cephei.
Oh, the formulas: Red: iif(Ha > 0.15, Ha, (Ha*0.8) + (OIII*0.2)) Green: iif(Ha > 0.5, 1-(1-OIII) * (1-(Ha-0.5)), OIII * (Ha+0.5)) Blue: iif(OIII > 0.1, OIII, (Ha*0.3) + (OIII*0.2))
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