M1, Crab Nebula

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Date   11/15/2006,11/16/2006,11/18/2006,11/19/2006,11/20/2006,11/21/2006
Conditions   20.25 mags/sq arcsec at zenith on 11/21/2006
Scope   Vixen VC200LDG @ f/9
Filters   Baader UV-IR Cut, Baader 7nm Hα
Camera   Canon 350D (IR modified)
Exposure   61x5min ISO1600; 13x20min ISO1600 Hα (5h:5m RGB; 4h:20m Hα)
Processing   ImagesPlus 2.8 raw conversion, dark/flat/bias calibration, stacking, DDP, star reduction; PS CS2, levels, curves, Hi-pass, USM; Noel's Actions, deep space noise reduction, soft color gradient; Gradient Exterminator
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