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About this Image
Located at a distance of about 1,600 light years,
The famous Orion's SWord contains the Orion Nebula complex (M42, M43) as the brightest diffuse nebula in the sky.
To the north (left) the bicolored Running Man emission and reflection nebula (NGC 1977) is placed.
16" cassegrain in primary focus at f/3 and secondary focus at f/10
|Camera||SBIG STL-11000M at -30C, internal filter wheel|
|Sky Conditions||mag 5 - 5.5 sky|
f/10 center from Feb 09 2005,
other f/10: each L = 60 minutes (10 minute sub-exposures),
f/3: L:Ha:G:B = 90:120:90:120 (10 min sub-exposures for G,B, 30 min for Ha),
Image aquisition, calibration and color combine Ha:G:B in Maxim 4.11,
Image compositing, Ha+L as Luminance, color balance, curves, unsharp mask in Photoshop; noise reduction by Neatimage;
north is left;