Decided to try out the OSH palette for once (aka the synthwave or bisexual palette). This is the combination of three monochrome images taken through Oxygen, Sulfur, and Hydrogen filters, which were then mapped to Red, Green, and Blue channels, respectively, to make a false color image. I've usually combined my past narrowband images using the [SHO (aka Hubble) Palette](https://live.staticflickr.com/65535/49835160918_15f0d80923_o.png), but wanted to change things up for this one. For the record I have no idea where the lion is in this, but this is the common name for the nebula. Also made a [starless version which helps show off the fainter nebulosity](https://i.imgur.com/aoXUNmJ.jpg). Captured on October 15-18th, 2021 from a Bortle 6 zone.
**Places where I host my other images:**
[Instagram](https://www.instagram.com/leftysastrophotography/) | [Flickr](https://www.flickr.com/people/leftysastrophotography/)
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**[Equipment:](https://i.imgur.com/6T8QNsv.jpg)**
* 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, Sii 5nm
* Agena 50mm Deluxe Straight-Through Guide Scope
* ZWO ASI-290mc for guiding
* Moonlite Autofocuser
**Acquisition:** 22 hours 42 minutes (Camera at Unity Gain, -15°C)
* Ha- 35x360"
* Oiii- 72x360"
* Sii- 70x360"
* Darks- 30
* Flats- 30 per filter
**Capture Software:**
* Captured using [N.I.N.A.](https://nighttime-imaging.eu) and PHD2 for guiding and dithering.
**PixInsight Processing:**
* BatchPreProcessing
* SubframeSelector
* StarAlignment
* [Blink](https://youtu.be/sJeuWZNWImE?t=40)
* ImageIntegration
* DynamicCrop
* DynamicBackgroundExtraction
* EZ Decon + Denoise (Ha only)
* STF applied via HistogramTransformaion to bring each channel nonlinear
* Channel combination to make RGB image (OSH --> RGB)
* LRGBCombination with Ha as luminance
* SCNR green
* Shitloads of CurveTransformations to adjust lightness, contrast, saturation, hues, etc.
* LocalHistogramEqualization
* ColorSaturation
* HistogramTransformation to lower black point
* EZ Star reduction (multiple passes throughout nonlinear processing)
* NoiseGenerator to add noise back into reduced stars
* More curves
* Resample to 60%
* Annotation
lefty7283
