I took this 2 hr 52 minute image of the Pleiades November 29, 2021. My processing skills were rudimentary at the time. Now that they have improved I went back to this old data and wanted to see what could be done with it. I'm looking for a scope to attempt good resolution views of small galaxies. I have so far stayed with refractors because my SCTs showed a lot of peripheral coma (they are older models, not the newer Edge HD versions). But I've reached the point where I'd have to move up to a good 6 inch refractor and the cost is very high. And I'm not sure 6 inches is enough for small galaxies. So I'm revisiting my C6 and my C9.25 now that my stacking and processing skills are better. If the C9.25 works out OK with the 0.63 focal reducer that I use on my C6, maybe I can tame the peripheral coma in post-processing. That would be a good thing
This image was taken with my C6 using a 0.63 Celestron focal reducer and an old Canon EOS T5 DSLR. It was calibrated and stacked in Sirl and post-processed in Sirl, Gimp, ImagesPlus, and PS Elements. The nice thing about using refractors is that usually post-processing is minimal and can all be done in Sirl. SCTs are more complicated that way.
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