6888, The Crescent Nebula
Hydrogen - alpha light
This grayscale image shows the fine internal
structure of the Crescent Nebula. The color image using this image for the
luminance layer is here.
2003 August 24
12.5 inch at f4.5 on AP 1200GTO mount, guided with ST-4 on
guidescope. Camera: SBIG
ST-10XME at -15 °C
and CFW-8a color wheel, controlled with
Luminance = H-alpha 3 x
20 min + 6 x 10 min, 3 nM filter.
Frames calibrated and combined in
MaxIm and debloomed with the CCD-NewAstro
Debloomer. The Ha-luminance layer was subjected to DDP processing in MaxIm.
processing with Levels and Curves in
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