Cygnus
| Scope | f | Mount | Camera | Film | Exposure | Digital info | Location | Date |
| Piggyback on 130EDT | f4 | AP600EGTO | Pentax 6x7 with 105 lens |
E200 for hydrogen alpha Provia 400F for color |
2 x 60 minutes for hydrogen
alpha 2x20 minutes for color |
Scanned and enhanced by Kirk Rogers,
my friend! The hydrogen alpha were combined and mixed with the red channel from the color with a median/mean combine in registar with weighting applied equally. The hydrogen alpha had a severe light pollution gradient that when corrected, altered star brightness in the red channel, thus altering the overall star color. That is why I mixed the hydrogen alpha with the red channel, to try and preserve the red star color in the upper right corner. |
Hydrogen alpha taken from
Donald C. Martin observatory Color taken from Spruce Knob, WV |
July/August 2002
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