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NGC1977 Running Man Nebula
LX90 GPS 8" f/3.3 DSI-C
80x30sec Alt-Az unguided
collected 1/13/08 Envisage 4
stacked and aligned in AIP4WIN
Photoshop CS2 1/20/08 - levels, curves
Carboni "Local Contrast Enhancement", "Enhance DSO & Reduce Stars"
high pass nebula only; AIP4WIN spatial wavelet filter
final levels adjustment toward reproducing the histogram for this region of
Mark Sibole's challenge image. (moved green lower than red; blue was higher)
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