Northern 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

 

2 x 60 minutes for hydrogen alpha

 

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 overrall 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

 

July/August 2002

 

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