M42 and NGC1977 - Narrow Band
Object: M42 (Great Orion Nebula) and NGC1977 - Narrow Band
Equipment: Takahashi FSQ-106N on Takahashi EM-200 mount with Vixen 60X700 guidescope; SBIG STL-11000M with narrow band filters (Astrodon, 5nm, H-alpha [hydrogen 656nn], OIII [oxygen 501nm], SIII [sulfur 672nm]
Exposure/Processing: 45 minutes each filter (900S exposures). Processed as RGB (R=H-alpha; G=SII; B=OIII) in Maxim DL and Photoshop. Layers added 4x300s and 4x30s. 3x30 minutes H-alpha used as luminance.
Location/Date: Gainesville FL / January 25-27, 2010