Telescope: Celestron 9.25"
Schimdt-Cassegrain at f/6.3
Focus: Prime focus
Filter: Celestron LPR
Mount: Vixen GPD with Skysensor2000
Camera: Modified Canon EOS 300D, at
Guiding: 700mm refractor guidescope,
SAC7 camera, autoguided with Guidedog software
Exposure: Total 60 mins (20 x 180s)
Date: 7th February 2005
Processing: RAW file conversion,
Offset and Dark subtraction, flat fielding, registering and stacking done in
IRIS. Curve stretching and colour saturation enhancement by Luminance
Layering in Photoshop CS. Bright stars were 'held back' in the curve
stretching to prevent them bloating.
Processed using flats produced using the new
light box. The resulting background is now quite even, with little
evidence of the colour fringing seen with previous flats.