Hello James, despite your reservations this is a worthy effort; I like it. Yet another suggestion for 'us' to have a go at this object.
You've also captured Cygnus X-1, the strongest X-ray and the first such source believed to be a black hole - bottom of the tulip and left about a couple of inches (at 100%).
Yes, the noise is visible, and wondering why. Perhaps it's the low number of exposures; the filter being narrow band does extend the length of each exposure. Not including darks would also contribute of course, a shame about them.
Could I suggest something? The people over at DSS suggest that if using a CMOS rather than CCD sensor then using dark flats will give better results than bias frames; because you're otherwise subtracting a calibration frame twice, negating it's affect. I can, 'offline', give the explanation; it's technical.
Dark flats are easy; exactly the same as darks but with the lens cap on, change nothing else, and they're also quick.
As for colour, not sure about refining. Half of people like it as it is, and the other half are never satisfied (my little insight into human nature :).
Your workflow sounds, how can I put this, sensible? It lists as you're doing all the right things, and any weakness in the results seems, to me, to not having enough data. Definitely worth revisiting, and with your filter the Moon won't be as much of a hindrance.
Nearly forgot, the method you use to estimate exposure, is this the SharpCap Smart Histogram? Kevin and I are looking to try that next; long overdue.
Thank you for sharing.
William
On Sun, 3 Oct 2021 at 14:35, 'JR' via croydonastro <
croydo...@googlegroups.com> wrote: