Gerr Posted November 11, 2022 Share Posted November 11, 2022 The California Nebula (NGC 1499) in the constellation Perseus. The conditions were not ideal being a bit windy in North Wales and a waxing gibbous Moon to boot. But due to its intense hydrogen emission and having an Optolong L-extreme filter in my imaging train I thought it was fair game!! I managed 5.7hrs (57lights at 360secs) on a HEQ5 mount using a SW ED80 Refractor and Zwo asi294mc pro camera (unity gain, cooled to -10). APT and PHD2 helped with image acquisition. Guiding remained stable with only about 15% of lights discarded. Darks, Flats and dark flats to supplement lights which were stacked in DSS (no flat calibration issues with L-extreme I may add). Fully processed in Photoshop CS. CC's welcome. 5 Link to comment Share on other sites More sharing options...
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