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The Elephant trunk nebula 01/10/2011 Le Chesnoy (45, France) Telescope: 80ED refractor F=600mm Guiding: None Mount: Celestron CG5 Imager camera: Atik 314L+ at -12°C Moon: no moon Conditions: calm, 12°C Exposures: L:6x40s R:4x40s G:6x40s B:5x40s Ha:9x40s Binning : LRVB:bin1 Ha:bin2 Offset: 15x1/4000s Dark: 3x90s Offset: 15x0,001s Dark: 3x40s Flat: 15 par filtre Processing: IRIS then GIMP : levels, adding H-alpha layer, remove saturation of blue layer of the stars, gaussian selective blur? Commentary: it needs longer exposure time. 
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