[AZ-Observing] Re: Faint nebulosities surrounding M42
- From: Andrew Cooper <acooper@xxxxxxxxx>
- To: az-observing@xxxxxxxxxxxxx
- Date: Sat, 17 Dec 2005 10:42:53 -0700
Everyone says, great shot, but I would say great processing! Getting
the raw material involves some skill, but mostly expensive equipment.
It is the processing where the skill is so critical.
You feathered in the brighter regions well, I can't see any sign of
where the layers meet. Color balance looks pretty good as well, I like
the dusty yellow stars on the lower right corner. The bright blues and
a few orange stars look good as well.
Nice Shot!
Andrew
Andrew Cooper
----------------------------------------------------
http://www.siowl.com
Jon Christensen wrote:
>Hi Andrew. You are correct about blending different exposure lengths.
>About 95% of the picture was shot on December 4-5 with the luminance being a
>series of 24 ten minute exposures (not counting the exposures I had to toss)
>and the color data which were 5 minute subs binned 2x2. The brightest
>parts of the nebula saturated my chip and turned completely white which is
>what I expected. I then used data from last year's picture to fill in those
>parts that were saturated because I felt I couldn't improve on those areas
>this year because I was using the same equipment. Those exposures ranged
>from 5 seconds to 2 minutes. The 5 second exposures were about as long as I
>could go without saturating the trapezium with my F/3 scope.
>
>Jon Christensen
>
>
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