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M1, Messier 1, The Crab Nebula
(click for full-size image)

Optics: Stellarvue 115 f/7, Astro-Tech AT2FF Field Flattener
Camera: QSI 683wsg @ -25C
Filters: Astrodon Narrowband Filters (H-alpha 5nm, OIII 3nm, SII 5nm)
Mount: Losmandy G11-G2 with OPW
Guiding: OAG with Starlight Xpress Lodestar Auto Guider / PHD Guiding
Location: North Attleboro, Massachusetts
~16 hours exposure over 4 nights, 11/18/2012 - 11/25/2012
Ha:OIII:SII 6h45m:4h15m:5h15m (27x15m : 17x15m : 21x15m) binned 1:2:2
Captured with Sequence Generator Pro
Processed with PixInsight and Photoshop CS6