Seestar S50, roughly 6 hours from Bortle 9 (Madrid, Spain).
This was not an easy post-processing due to Alnitak's brightness and I cna probably do better… I kept on getting a halo and artifacts around it that I kind of managed to remove by altering the process a bit, and added small diffraction spikes to "hide" it a bit. Processed in Pixinsight and Siril. Taken with Askar C1 Ha-OIII filter.
- WBPP
- Dynamic crop and SetiAstro DBE
- StarX (before anything else, this is what helped me get the smallest halo)
- Starless image, BlurX, NoiseX, then histogram and curves transformation in Siril
- Masked stretch in PI (left/right)
- For stars, asynth stetch in Siril and slight histogram transformation. Star recombination
- Added small star spikes in SetiAstro
- Small BlurX and NoiseX in PI, final curve transformation retouches
by Techno-Scientist