A few hours of clear sky finally arrived last night! My last deep sky image was taken five months ago and I felt I needed to warm-up my long dormant imaging techniques with a few quick target practice images despite demi moonlight. I chose to use my 16 inch Newtonian at f4.5 and new Nikon D7000 with a Baader MPCC coma corrector for a first light combo. In my excitement, I failed to ensure that the ideal backfocus required by the coma corrector was properly set and that my camera sat orthogonally on the focuser. Thus stars on the edge of field are not the points I would have wanted. The half-moon was captured with a single frame at ISO 100. The succeeding images of M57 the Ring Nebula, periodic Comet Hergenrother 168/P, and open star cluster NGC 884 in Perseus were each created from three 30 second stacked images exposed at ISO 8320.
