Object: M1 Crab Nebula Optic: CA300 (300/1200mm Newton f4), GPU Corrector Mount: Skywatcher EQ8 Camera: ZWO ASI 1600MM-C @ -20°C, Gain 75, Offset 15 Filter: ZWO EFW 7x36mm, Baader 36mm Filter Exposure: total 5.2h, Ha 33x4min, OIII 34x4min, R 7x2min, G 7x2min, B 7x2min 327xBias, 48x Darks(2min:4min), 31x Flat(Ha:OIII), 25x Flat (R:G:B) Color: Ha-OIII,RGB Capture: SGP (Sequencing, Autofocus, Dithering, FlatWizard) Guiding: TS-OAG 9mm, ASI120MM, PHD2 Date/Location: 2018-02-14, Zirndorf Image Processing: Pixinsight: ImageCalibration, CosmeticCorrection, StarAlignment, Blink, ImageIntegration, BatchPreprocessingScript (for RGB), ChannelCombination, DBE, PhotometricColorCalibration, STF for OIII, HT-Stretch for RGB, StarMask ST: DDP for Ha, Magic PS: NIK Difine2 for RGB, ColorBalance, maskedMinimumfilter, Dynamic, Levels, Blend of masked NB-Channels matching visual spectrum according to Debra Ceravolo: Curves, Levels and GradientMap as clipping mask, Ha as LuminanceLayer, Dynamic, color Stars in Nebula, masked HighPassSharping |