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M1, the Crab nebula 17/02/2011 from Thézac (17, France) Telescope: 80ED refractor F=600mm Guidaging: None Mount: SkyWatcher NEQ6 Imager: Atik 314L+ at -15°C Moon: full moon very annoying Conditions: cold night around 4°C, very humid Exposures : R:5x60s G:5x60s B:5x60s Offset : 15x1/4000s Dark : 3x60s Flat : 15x0.001s IRIS Processing: remove offset and dark, divide by the flat, registration and addition of the images, RGB combination. GIMP Processing: none Commentary: My first successful process with flat. To redo with longer exposure time and longer focal length. 
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