Comet Holmes, 17P, taken Nov 1, 2007 on excellent night. Taken with A&M 105mm apo refractor at f/5 with Borg 0.85x compressor/field flattener on SkyWatcher HEQ5 mount. Canon 20Da camera at ISO400. Composite of 4 min, 2min, 1min, 30sec, 15sec, and 7 sec exposures, each exposure being a stack of 3 to 4 identical exposures. Registered and stacked in Photoshop (HDR mode did not produce usable result, so manually composited with sucessively smaller masks to reveal short exposure content around nucleus. Contrast exaggerated with Curves to bring out very faint tail structure. North up, so tail to the S and SW.Nucleus is dot at upper left of inner coma, other star in inner coma at right is a field star
Double Cluster in Perseus, taken Oct 14, 2007 with 5-inch apo refractor at f/6 with Canon 20Da at ISO 800 for stack of 4 x 8 minute exposures. Some haze. Used ST402 guider.
NGC 891 Galaxy in Andromeda. Take Oct 13, 2007 with 5-inch apo refractor at f/6 with Canon 20Da at ISO 400 for stack of 4 x 18 minute exposures. Some haze. Very slight misguiding (used PHDGuide and Meade DSI) Abell 347 galaxy cluster at lower right.
