I captured an image of the California Nebula using my Rokinon 135mm prime lens at f/2.8, mounted on a Canon 1300D DSLR camera, which was attached to a Star Adventurer 2i pro tracking mount. The settings were 50s at 1600 ISO, with 40 flat frames and 25 dark frames. I managed to take 130 images, all of which were stacked in DSS, processed in Siril, and finalized in Gimp 2.10. Additionally, I used an intervalometer to control the camera and a Bahtinov mask for focusing on a bright star. The image was taken under Bortle 3 skies at Rhossili, Gower.
Click on the image to get a closer view
The California nebula
The image processed by advanced star-removal, separate star and nebula processing and star replacement
Chris Playle
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