Sterrenland Posted June 2, 2021 Share Posted June 2, 2021 After months of bad weather and other things getting in the way I finally got the scope out...beautiful clear night. Decided to spend a couple of hours on M101 with my SW 80ED and Canon DSLR. Still haven't got around to guiding and dithering...and still thinking about getting a ZWO 294MC camera! 8 Link to comment Share on other sites More sharing options...
wimvb Posted June 3, 2021 Share Posted June 3, 2021 Very nice catch. Have you tried using pixinsight scnr (green) on it without any mask? I think you will get clearer colours if you do. Just a thought. 1 Link to comment Share on other sites More sharing options...
wimvb Posted June 3, 2021 Share Posted June 3, 2021 14 hours ago, Sterrenland said: Still haven't got around to guiding and dithering...and still thinking about getting a ZWO 294MC camera! Do + do. Adequate dithering will "quiet down" the background, reducing colour mottle and possible walking noise. Dither at least 12 pixels in a random or spiraling pattern. Btw, you can reduce both colour mottle and walking noise with targeted noise reduction methods in PI. For colour mottle, I can recommend MMT on 8 layers, targeting Chrominance (colour). A cooled astro-camera is much more sensitive than a dslr, and you can take controlled calibration frames. 1 Link to comment Share on other sites More sharing options...
Sterrenland Posted June 3, 2021 Author Share Posted June 3, 2021 13 hours ago, wimvb said: Very nice catch. Have you tried using pixinsight scnr (green) on it without any mask? I think you will get clearer colours if you do. Just a thought. Had another play with the data...bit of an improvement, but agree that dithering, guiding and a better camera would help substantially! But thanks for your kind comment and help. 3 Link to comment Share on other sites More sharing options...
wimvb Posted June 3, 2021 Share Posted June 3, 2021 I had a play with the jpeg from your first post. Applied scnr green, muted the mottle and pushed colours in the galaxies a bit. 3 Link to comment Share on other sites More sharing options...
Sterrenland Posted June 4, 2021 Author Share Posted June 4, 2021 10 hours ago, wimvb said: I had a play with the jpeg from your first post. Applied scnr green, muted the mottle and pushed colours in the galaxies a bit. Thanks...looks a whole lot better than my effort. I like the more sharpened effect you've achieved and the colours are better too. Thanks for taking the time. Link to comment Share on other sites More sharing options...
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