Re: [APML] Gamma-Cygnus taken with FSQ-106N

[Chuck Vaughn <aa6g@aa6g.org>]

Wade,

I hate to be the bearer of bad news but there is quite a bit of area  
with little or no nebulosity. It only appears to be all nebulosity  
because of how you have it adjusted. You've clipped off a good  
portion of the low end blue and green data and have red slid much too  
far up the histogram.

As a quick fix, try this in Photoshop:

Open Curves, and select each channel individually and adjust as follows:

            Input       Output

Red      25             0
Green    0             20
Blue       0             20


Try reprocessing it so the start of each channel in the histogram is  
at about the same number.

Chuck

------------------------------------------------------------------

> To all,
>
> You'll be glad to know this is my last deep-sky image taken during
> the August 2005 New Moon window.  This was by far the most difficult
> to flat-field since there is NO nebulous-free (is that even a word)
> area.  I totally winged it.  Please, let me know if you see any
> problems.  As with the NGC7000 image, it's an 80 minute exposure
> through a Takahashi FSQ-106N.
>
> http://tinyurl.com/9qq8l
>
> Wade
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