M1 in narrowband filters

This image of M1, the Crab Nebula in Taurus, was taken in 85 minutes of narrowband filters H-alpha 7nm, OIII, SII and H-beta. The pink is hydrogen and some sulphur, the blue is hydrogen, the green is oxygen. Usual set-up Baader 1.25-inch filters on cooled Opticstar 145m-ice camera, Televue 102 refractor on CGEM mount, Lodestar guider and control via MaximDL as well as photo processing. Photoshop CS3 was used for final touch-up.

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