2177, The Seagull Nebula,
This is a tough
target! The version shown here (one of many) is a peculiar combination of an RGB
image as the color information and an Ha-GB image as the luminosity layer. Not
surprisingly, it looks overprocessed and the color is off, but the less
processed versions were a lot worse!
Also known as the
Gum 2 nebula, IC 2177 is very large (120 x 40 arcmin) and quite dim. It was an
excellent test object for my Nikkor 180 mm manual telephoto lens.
Nikkor 180 mm lens at
f/4 with ST-10XME CCD camera (Mandel adapter) at -15 °C
piggy-backed on the
A-P 1200 GTO mount.
Guided with the ST-4 guider on a guide scope.
12 x 10 min H-alpha (1x1
binning); 5x10 (1x1 binning) and 4 x 10 min (2x2 binning) R, G, and B.
SBIG filters in SBIG CFW-8 filter
Raw frames debloomed
with Wodaski's Debloomer plug-in. Stacked and RGB combined
MaxIm 3.09 with R=1.2, G=1.0, B=1.65 weighting.
Registered in RegiStar.
levels and curves in PhotoShop 7.0.
to new Stuff