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NGC6888
I lost a couple of frames of O3 data to an unknown problem that caused moderate elongation of stars - probably flexure of some kind. So I'll get more data on this when I can, but some wisps of oxygen-3 (in blue/green) are visible here.
AP Starfire 142 at f/7 (no flattener or reducer)
AP Mach1 mount
QSI 583
2 hrs H-alpha, 1.25 hrs O3
Comment
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Comment by Greg Marshall on July 14, 2012 at 10:39am
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Thanks, Steve. This was done from my home observatory, which is only about 20 miles from Portland, Oregon. So I mostly do narrowband imaging (like this) at home, but go to dark sky sites for RGB imaging when I can.
I did get more O3 data later, but it didn't add significantly. I think I need a narrower O3 filter!
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Comment by Steve Coates on July 14, 2012 at 7:54am
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Nice image Greg despite the "unknown" problem! Do you image from dark skies?
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