1499, The California Nebula,
The California Nebula is another huge
nebula, 140 x 40 arcmin, and does not fit the field of view of most telescopes.
It was an excellent test target for my recently acquired Nikkor 180 mm telephoto
lens, set up on the CCD camera with the Mandel Adapter. Visually, this is a very
dim nebula but it is easy to pick up in red or hydrogen alpha light and a CCD
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
(luminosity) plus R 7x10, G and B 6x10 min (all1x1
SBIG filters in SBIG CFW-8 filter
Raw frames debloomed
with Wodaski's Debloomer plug-in. Stacked and RGB combined
in MaxIm 3.08
with R=1.2, G=1.0, B=1.65 weighting. Stretched with
levels and curves in PhotoShop 7.0.
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