Two Collections for Comparison:I am going over the Sharpless2 Objects again with my new C11 and a few more years experience. This version is about 3h of Ha and processed with StarX and BlurX and GHS.
I am pretty happy with the quality of the image in the destarred H-alpha. Thanks to Alex Woronow for processing insights.
Below is a similar image taken with my Stellarvue for a total of 20h of which 15 is H-alpha. No AI or GHS.
Sh2 93 15 1h HA exposures 
Sh2 93 HA RGB Basic Information From GalaxyMap about Sh2 93:Includes the infrared star cluster candidate [BDS2003].
Ionised by the O9V star [F89b] S93
1.
^ Bica, E., Dutra, C. M., Soares, J., et al. (2003). "New infrared star clusters in the Northern and Equatorial Milky Way with 2MASS", Astronomy and Astrophysics, Vol. 404, 223-232.
2.
^ Forbes, D. (1989). "Photometry and spectroscopy of stars in northern H II regions", Astronomy and Astrophysics Supplement Series, Vol. 77, 439-445.
Distance Estimates:=item-distance-estimates=item-distance-display3713 pc [[url=
http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2003A&A...397..213P]2003A&A...397..213P]
=item-distance-display2600 pc [[url=
http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1990AJ.....99..846H]1990AJ.....99..846H]
GENERAL NOTE ON SHARPLESS2 OBJECTS>>>>>>>>>>>>>There are 313 Sh2 objects. All now imaged by yours truly. These are basically the Hydrogen Alpha and other ionized nebulae around the edge of the Milky Way.
This is my collection:
Sharpless2Wide-Angle Hydrogen Alpha Nikon Image Sh2 79-171Please note there is also a Sharpless2 Group with now more than 3000 examples.
Sharpless2 GroupOther useful links include:
Gary Imm's CollectionGalaxyMap's CollectionThe Sharpless CatalogThe MDW H-alpha Sky SurveyReiner Vogel's detailed observing catalogHope you enjoy these obscure but interesting objects...
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