After being inspired by [Chuck's video](
https://www.youtube.com/watch?v=Tbn5v13H5ko) and this month's OOTM competition on /r/astrophotography I decided to go after WR-134. Due to all of the faint details in this region I also [made a starless version using StarNet](
https://i.imgur.com/ONENfxf.jpg), as well as a [semi-starless version](
https://i.imgur.com/M1VyaBJ.jpg) using a clone stamped star mask and aggressive MorphologicalTransformation. Captured on September 2nd, 3rd, and 6th, 2019 from a bortle 7 zone.
**Equipment:**
* TPO 6" F/4 Imaging Newtonian
* Orion Sirius EQ-G
* ZWO ASI1600MM-Pro
* Skywatcher Quattro Coma Corrector
* ZWO EFW 8x1.25"/31mm
* Astronomik LRGB+CLS Filters- 31mm
* Astrodon 31mm Ha 5nm, Oiii 3nm
* Agena 50mm Deluxe Straight-Through Guide Scope
* ZWO ASI-120MC for guiding
* Moonlite Autofocuser
**Acquisition:** 9 hours 30 minutes (Camera at Unity Gain, -10°C)
* Ha- 49x360"
* Oiii- 46x360"
* Darks- 30
* Flats- 30 per filter
**Capture Software:**
* EQMod mount control. Captured using [N.I.N.A.](
https://nighttime-imaging.eu/) and PHD2 for guiding and dithering.
**[PixInsight Processing](
https://i.imgur.com/4Xgpg3M.png):**
* BatchPreProcessing
* SubframeSelector
* StarAlignment
* [Blink](
https://youtu.be/sJeuWZNWImE?t=40)
* ImageIntegration
* DrizzleIntegration (1X, VarK 1.5)
* DynamicCrop
* AutomaticBackgroundExtraction 2X
* TVG/MMT Noise Reduction (Jon Rista Method)
* HistogramTransformation (permanently apply Auto-STF Stretch)
* PixelMath to combine channels
> R=iif(Ha > .15, Ha, (Ha\*.8)+(Oiii*.2))
> G=iif(Ha > 0.5, 1-(1-Oiii)*(1-(Ha-0.5)), Oiii *(Ha+0.5))
> B=iif(Oiii > .1, Oiii, (Ha\*.3)+(Oiii*.2))
* Invert > SCNR > Invert
* MLT noise reduction
* Several [Curve](
https://i.imgur.com/QPUOHlw.jpg)Transformations for contrast, hue, and saturation
* MorphologicalTransformation to reduce star sizes (ADVStarmask with MT tweaks)
* More Curves
* Annotation
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