NGC 6819 open cluster in Cygnus. Taken Nov 2, 2010 with 105mm A&M apo refractor at f/5 with Borg .85x flattener/reducer and Canon 5DMkII at ISO 800 for stack of 4 x 10 minute exposures, Mean combined. Used Celestron CGEM mount and Celestron NexGuider on William Optics 66mm guidescope. All seemed to work well.
NGC 6819 cluster in Cygnus with 105mm A&M apo refractor at f/5.4 with Borg 0.85x compressor and Canon 20Da camera at ISO800 for stack of 4 x 6 minute exposures. Taken on a very warm night in July 2007.
Stack of two 5 minute exposures at ISO400 with Canon 20Da camera, and Astro-Physics 4-inch apo refractor at f/4.5. Taken August 1, 2005. Second layer median filered and gaussian blurred to add glows around brighter stars, and mixed in with Lighten mode at 100%, and contrast boosted by +50 to brighten stars.
