M42, The Great Nebula in Orion

 

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Exposure Data: 12/7,8/2001.  LRGB: 30x1m, 10x1m, 10x1m, 10x1.6m. RGB binned 2x2. (Long Exposure)
RGB: 25x10s, 25x10s, 25x16s. (Short Exposure) -25C, 2.65 arc-sec./pixel
 
Processing: Acquired in Maxim, reduced, aligned and combined in Mira, RGB combine in Maxim, L+RGB combine, curves, levels, bloom repair and other adjustments in Photoshop. Layering was in Photoshop using techniques outlined in January, 2001 Sky & Telescope.
 
Optical System: TV-140 5.5 f/5 APO refractor, ST-8E NABG/CFW-8A CCD camera, AP900GTO mount.
 
Comments: First attempt at exposure layering.