A Skymax 127 Maksutov was mounted on a Celestron AVX mount. A Canon EOS 4000D DSLR was placed at the Cassegrain focus and was USB tethered to a Fedora Linux laptop running AstroDMx Capture.
45s exposures were captured of M13 with matching dark-frames.
Click on an image to get a closer view
Screenshot of AstroDMx Capture for Linux capturing exposures from the USB tethered DSLR
The best 23 images were stacked and dark-frame corrected in Deep Sky Stacker.
The resulting image was post processed in The Gimp 2.10, Affinity Photo and Neat image.
M3
Steve Wainwright and Nicola Mackin
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