The end result of all of that calibration workflow stuff I posted about a couple of days ago (plus many, many other processing steps).
This is the planetary nebula M27, also known as the Dumbbell Nebula, in the constellation Vulpecula. It is the remains of a dying white dwarf star about 1,360 light years away that started to disintegrate about 15,000 years ago, due to no longer having sufficient mass to hold itself together. It’s easily visible in binoculars or small telescopes in the summer sky.
This particular image is just over 2 1/2 hours of exposure time from the extremely dark skies at Oregon Star Party last year. The camera was a QSI583wsg monochrome CCD camera, attached to a Celestron Edge HD11 corrected Schmidt-Cassegrain telescope with 0.7x focal reducer, and mounted on an Astro-Physics Mach 1 GTO equatorial mount. The focal length of that optical setup is just under 2000mm, and results in a field of view that is about half a degree across. The resulting image data was processed in PixInsight.