Messier 41, open star cluster below Sirius in Canis Major. This is a stack of 4 x 6 minute exposures at ISO 800 with the Canon 5D MkII and Astro-Physics Traveler 105mm apo refractor, shot from Timor Cottage, Coonabarabran, NSW, Australia, December 2012.
M42 and NGC 1973-5-7 Nebula with 5-inch AP apo refractor at f/6 and Hutech-modified Canon 5D camera. Stack of 4 x 14 minute exposures at ISO 400 + 3 x 2 minute exposures for core at ISO 400.
Orion Nebula region with NGC1973-7. Stack of two 10-minute exposures + stack of 30s and 1min exposure for retaining bright core deail. Blended with Normal @ 85% but erasing all of short exposure layer except for core. With Canon 20Da, at f/6 with 5-inch AP apo refractor, ISO400, and Long Exposure Nosie Reduction ON in camera. Ambient temp was about -3° C. Taken Dec. 29, 2005.
