M27, taken Oct 8, 2007 with 5-inch Astro-Physics apo refractor at f/6 with Canon 20Da camera at ISO 400 for stack of 3 x 15 minute exposures. With 6x7 field flattener. Guided with Meade DSI/66mm guidescope and PHDGuide sofware. Some minor dec trailing.
Stack of two 12-minute exposures at f/6 with 5-inch apo refractor. Canon 20Da camera at ISO800. LENR employed in camera. Noise Ninja applied to both images. B&C and Levels adjusted to increase contrast, and Black level increased in Selective Color to darken sky. No other color shift employed.
