The California nebula through A William Optics 81mm APO refractor with an Altair Quadband filter and an Altair Hypercam 533C OSC 14 bit CMOS camera. 8 x 5 minute RAW exposures captured with AstroDMx Capture before clouds came in. Calibrated, debayered and stacked in PixInsight with SPCC; further processing in Gimp, GraXpert, Seti Astro's Cosmic Clarity and Neat Image.
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Two renderings of the California nebula
Steve Wainwright and Nicola Mackin
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