Leo Triplet of galaxies, taken with 5-inch Astro-Physics refractor at f/6 (no flattener) and Canon 7D camera, on Mach1 mount as a test of SBIG SG-4 autoguider. Stack of 2 x 8 minutes at ISO1600 and 4 x 15 minutes at ISO800. Median combined.
The pair of contrasting galaxies, the face-on spiral M77 and egd-on spiral NGC 1055 (above) in Cetus. Shot from home November 21, 2016 with the Explore Scientific FCD 102mm apo refractor at f/7 with a stack of 5 x 6-minute exposures at ISO 1600 with the Canon 5D MkII. Some frost at the end. The bright star is Delta Ceti. Russell Croman’s Gradient Xterminator applied to even out the background.
Taken April 19/20, 2006 with Astro-Physics 4-inch Traveler apo refractor at f/6 with 6x7 field flattener in place as well. Canon 20Da camera at ISO400 and stack of 4 x 16 minute exposures, on mild spring night. Some slight field rotation between frames due to misalignment. Frames de-rotated in Photoshop. Each galaxy masked and punched up a bit mroe with Curves and Selective Color.
