Waning Gibbous Moon

All Images Copyright Steve Cannistra

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Photographic Details:
Date:  October 1, 2004
Takahashi Sky 90 at f9 with the Extender-Q focal extender, on the G11 Losmandy Mount.
Autoguider:  SBIG STV with e-finder.
Camera:  SXV-H9
Astronomik Ha filter (13 nm bandpass); Astronomik RGB type II filter set.
Exposures:  Hydrogen alpha- 1 x 0.007" exposure.  (I took 40 sequential exposures of 0.007" each through the Ha filter and chose the best for subsequent processing).
Conditions:  Temperature 52 degrees F; poor transparency; good seeing as fog descended into region, calm.
No dark, bias, or flat frames used.  All levels and curves adjustments performed in Photoshop.  Lucy-Richardson deconovultion performed in ImagesPlus. 
This image was taken with the Extender-Q focal extender coupled to the Sky90, which converts it from f5.6 (focal length 504mm) to f8.9 (effective focal length 810mm).   The FOV with this set up is about 28 x 38 arcminutes, with an image scale of 1.63 arcseconds per pixel.

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