Telescope: Orion 80ED apochromatic
refractor at f/7.5
Focus: Prime focus
Filter: Astronomik Hydrogen Alpha
13nm FWHM, Astronomik RGB Filters
Mount: Vixen GPD with Skysensor2000
Camera: Artemis 285 CCD camera
Guiding: 700mm refractor guidescope,
SAC7 camera, autoguided with Guidedog software
Exposure: H-alpha 70 mins (14 x 300s), RGB
25, 30, 40 mins,
Date: 24th Feb 2006
Processing: Offset and flat
fielding, registering and stacking done in IRIS. No dark frames.
Curve stretching and Levels in Photoshop CS2. Luminance image was H-alpha. LRGB composite in Photoshop.
Luminance layering to increase colour saturation. Neat Image for noise
I aimed for a more natural colour balance
in this image, taking care that even dim stars showed characteristic
colours. From inspection of the blue exposures, the nebula appears to
be a mix emission and reflection elements.