Telescope: Orion 80ED apochromatic
refractor at f/7.5
Focus: Prime focus
Filters: Astronomik Type 2 L,R,G,B.
Mount: Vixen GPD with Skysensor2000
Camera: Artemis 285 CCD camera
Guiding: 700mm refractor guidescope,
SAC7 camera, autoguided with Guidedog software
Exposure: Total 75 mins (25 x 180s)
L, 33, 45, 39 mins R,G,B.
Date: 19th & 22nd July 2006
Processing: For all frames, offset and flat
fielding, registering and stacking done in IRIS. No dark frames.
RGB combination is first done in IRIS, and star colours are calibrated with
a G2V star. LRGB compositing, curve stretching, Levels, Smart Sharpen in Photoshop CS2.
LRGB compositing and colour saturation
enhancement through Luminance Layering.