Telescope: Orion 80ED apochromatic
refractor at f/7.5
Focus: Prime focus
Filter: Astronomik Hydrogen Alpha
13nm FWHM, Astronomik RGB.
Mount: Vixen GPD with Skysensor2000
Camera: Artemis 285 CCD camera
Guiding: 700mm refractor guidescope,
SAC7 camera, autoguided with Guidedog software
Exposure: Total 105 mins (15 x 420s)
L, 30, 25, 40 mins R,G,B.
Date: 4th Feb, 3rd March 2006
Processing: Offset and flat
fielding, registering and stacking done in IRIS. No dark frames.
Curve stretching, Levels, Smart Sharpen in Photoshop CS2.
Luminance layering with the RGB.