This is another collaboration image with French astrophotographer
Axel. I was helping him remotely with collimation and setup of his new Skywatcher 150PDS Newton. Axel lives in Paris –
The city of light – so we choose an object that we could both image with an H-alpha filter for light pollution supression.
Unfortunately, his Newtonian likely suffered from pinched optics as his final stack had triangular stars. I used StarNet2 to remove the stars from the combined dataset and I replaced them with better RGB stars from my ONTC telescope. The stack is pretty deep so I was able to apply some extra sharpening to key areas of the nebulosity.
The original version shows the full field of my ONTC. Axel used a different camera rotation, so the combined H-alpha data had to be cropped square. H-alpha was used as luminance.
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