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Friday, September 27, 2013
Since the weather dosen's support imaging, I extracted an other individual image out of the large Cygnus mosaic. This image shows the same area, than my first ever APOD image, back from the year 2008.
Butterfly, Crescent and the Tulip Nebula
Image is in mapped colors, from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen.
Image is shot with the Canon EF 200mm f1.8 camera optics, QHY9 a cooled astrocam and the Baader narrowband filter set, H-a, S-II and O-III. There are four individual panels, each panel is shot three times with different filter for the color image. Total exposure time is around 20h.
An experimental starless image