NGC 7331 and Stephen's Quintet below, with 5-inch Astro-Physics apo refractor at f/6 with Canon 20Da camera at ISO 800 for stack of 4 x 8 minute exposures, at ambient temp of about +4° C. Taken Oct. 7, 2007. No field flattener on scope -- however, even the 20Da needs it. Taken as part of A-B comparison with ST402 shots of same.
NGC 7331 galaxy and companions in Pegasus, with Stephan's Quintet nearby to the bottom of the frame. Taken with the 130mm refractor at f/6 and Canon 7D for a stack of 4 x 8 minute exposures at ISO 800. Taken from SSSP 2012
The great globular cluster and galactic nucleus remnant Omega Centauri, NGC 5139, with two galaxies in the field: Centarus A or NGC 5128, the Hamburger Galaxy, at top; and NGC 4945 at right. Ther field simulates a binocular field of view. This is a stack of 4 x 2-minute exposures with the 200mm telephoto at f/2.8 and Canon 5D MkII at ISO 2500.
