The Canon EOS 1000D DSLR fitted with a 2" nose-piece and a light pollution filter was placed at the Newtonian focus of an f/5, 130mm Newtonian and tethered to a Fedora Linux laptop. The rig was mounted on a Celestron AVX, EQ GOTO mount. 70 x 30s exposures (ISO 800) of M42 were captured automatically by Nicola's AstroDMx Capture For Linux along with 20 matching dark-frames. The best 66 frames were registered and stacked in Deep Sky Stacker running in Wine and the final image was post-processed in the Gimp 2.10, Neat Image and FastStone running in Wine.
The tethered camera at the Newtonian focus
Screenshot of AstroDMx Capture for Linux capturing data from the tethered camera
The Orion nebulae showing M42/43 and the Running Man nebula
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The same data processed as a monochrome image in Darktable, to reveal more nebulosity
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There is still a way to go, but Nicola is making progress in the implementation of USB DSLR tethering in AstroDMx Capture for Linux
