First results from Garry Sedun's new observatory in Arizona. This image of M81 includes the whole frame of a full frame DSLR camera. Note the star quality is good to the corners. The telescope does very fast imaging as the main part of the image is from a single 4 min frame!
Details
2014-02-27 at the Sedun Observatory.
Conditions - clear 10 deg C with moderate seeing and no wind.
Modified Canon 6D camera on 20" f/4 Newtonian with a TV Paracorr coma corrector and a Paramount ME mount.
Exposures - 4min at each of 400, 800 and 1600 iso with 10 flats and 4 similarly exposed darks.
Processing in Images Plus and Photoshop.