My first time imaging with ASI294 and processing in Pixinsight - have been practicing on some of my DSLR shots in Pixinsight to get the hang of it and all working reasonably ok.
Stacked using flats, bias and lights both manually and using batchpreprocessing. Use Auto Background Extraction (also tried Dynamic background extraction) and am left with a lot of red all around which I can't seem to get rid of.
What have I done wrong and is there a way to fix it? Is it because I did not shoot any darks (I believe that I can do this now as my camera is cooled so can just set to cooled to shoot them?)
Have tried as much as I can but am really stumped and as am a beginner worrying that maybe something was wrong when I took the photos - I used unity gain (120), cooled camera and my flats don't show much gradient apart from vignetting, neither do any of the single lights so am stumped!
Thank you so much in advance to anyone who helps me, have learned so much already from people here despite this being my first post
That's a very nice start. I can't really say you're oing anything obvios wrong, so I'll say how you can do things right. <smile>
This business is a constant struggle to extract a tiny signal from a sea of all kinds of noise. You need to use all available tools. Perhaps the most important one is total imaging time, more is always better. Another is darks.
Really, it doesn't look like you're making an obvious mistake. Perhaps just trying to stretch too hard.
But, if you want the best feedback, we could use a _lot_ more information. Details of your equipment, mount, scope, camera. Some idea of your light pollution level. Basic is urban, suburban rural. Next is the Bortle level. Below is a useful website. Cooling. How many subexposures of what length. How many calibration frames, acquired how. All software used. There is no such thing as "too much" information, if you want good feedback about what you could be doing better.
How to measure your light pollution level, with a DSLR and a lens, handheld. "good enough" accuracy for just about anything.
Have patience. It's taken me five years to drag myself to a bit above average. <smile> Do the research, this is a knowledge driven activity. It's crazy complicated, there's far more to learn than you can get from short posts here. You should have the first book below already. If not, get it. You're about ready for the second.
Edited by bobzeq25, 31 May 2020 - 10:52 AM.