Popular Post Padraic M Posted April 20, 2022 Popular Post Share Posted April 20, 2022 This is the results of 4.5 hours of OSC imaging from dark skies (B2) last night. The night started with really clear air and the darkest I've seen for some time. It did fog up a little in the early morning. This is a new rig for me - SW 150PDS Newt and ASI533MC Pro camera with Baader UV/IR Cut filter installed. I could see M101 already in the 8-second platesolve images; the first few subs were 120s but looked so clean that I bumped up to 5 minutes for the rest of the sequence. This is almost uncalibrated - 5min darks are cooking as we speak, and my flats are over-correcting for some reason so I just used some old flats I had lying around and the APP Correct Vignetting tool which did a pretty good job. I also have a new processing workflow, using APP for stacking, Siril for background extraction, photometric colour calibration and stretching, and adding the final touches in Gimp. When I have a full set of calibration frames I may be able to improve on this - I sense that there is some more detail to bring out in the outer spiral arms. I might also try to add some old Ha data from last year. 13 Quote Link to comment Share on other sites More sharing options...
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