NGC 5139 Omega Centauri globular cluster with 4-inch Astro-Physics refractor at f/6 WITHOUT field flattener and with APS-frame size Canon 20Da camera at ISO400 for stack of 4 x 5 minute exposures. Shot from Coonabarabran, Australia, March 23, 2007.
Open clusters NGC 5281 (bottom) and 5316 (top) in Centaurus -- nebulosity above 5281 is Gum 48d. Shot with 4-inch Astro-Physics refractor at f/4.5 with compressor/field flattener and with APS-frame size Canon 20Da camera at ISO800 for stack of 4 x 4 minute exposures. Shot from Coonabarabran, Australia, March 24, 2007.
