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the Witch's Broom nebula NGC6960 01/10/2011 au Chesnoy (45) Telescope: Orion 80ED refractor F=600mm Guiding: None Mount: Celestron CG5 Imager: Atik 314L+ at -12°C Moon: no moon Conditions: calm, 12°C Exposures: L:5x40s R:5x40s G:6x40s B:5x40s Ha:9x40s Binning: LRGB:bin1 Ha:bin2 Offsets: 15x0,001s Darks: 3x40s Flats: 15 per filter Processing: IRIS then GIMP : tresholds, levels, adding H-alpha layer, remove saturation of blue of the stars. Commentary: It's better than before, more true colours. I need to redo it with guiding. 
the Witch's Broom nebula NGC6960 le 28/08/2010 at Thézac (dept. 17, France) Telescope: 80ED refractor F=600mm Mount: C8 at F=2000mm avec camera CCD LodeStar StarLight Xpress, PHDGuiding software Mount: SkyWatcher NEQ6 Imager: Atik 314L+ at -17°C, binning 1x1 Moon: annoying Conditions: cold night, 10°C Exposures: G,H-alpha: 2x300s R,B:1x300s Offsets: 30x0.001s Darks: 3x300s IRIS processing: Removal of offset and dark, registration and addition of exposures, then combining LRGB layers GIMP processing: level of black, saturation, curves. Commentary: - 
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