Messier 11, the Wild Duck Cluster in Scutum. This is a stack of 4 x 4 minute exposures at ISO 800 with the Canon 7D and 130mm Astro-Physics refractor at f/6 with the 6x7 field flattener. Taken at the SSSP 2012 in Cypress Hills.
M13 in Hercules, Taken Oct 8, 2007 with 5-inch Astro-Physics apo refractor at f/6 with Canon 20Da camera at ISO 400 for stack of 2 x 12 minute exposures. NGC 6207 galaxy at top. Guided with Meade DSI/66mm guidescope and PHDGuide sofware.
M13 with 130mm Astro-Physics apo at f/6 with no field flattener (slight camera tilt results in more coma at left of frame), for stack of 6 x 6 minute exposures at ISO 800 with Canon 7D (stock camera, not modified). Auto-guided with SG4. Worked perfectly. Slight rotation around guide star made it impossible for Photoshop to do an auto-align. Had to manually align.
