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 70 mins (14 x 300s)
L, 70, 60, 55 mins R,G,B.
Date: 19th & 20th May 2006
Processing: Offset and flat
fielding, registering and stacking done in IRIS. No dark frames.
Curve stretching, Levels, Smart Sharpen in Photoshop CS2.
Luminance is a mix of Red and H-alpha. Luminance layering with the RGB
to get the colours right.
As a final step, the image was then combined back with the pure H-alpha as
luminance. Noise reduction in Neat Image.