ASTRO: Quick and dirty M31 LRGB
Richard Crisp wrote:
"Rick Johnson" wrote in message
ster.com...
Richard Crisp wrote:
i shot some unfiltered lumnance last night of M31: 3.75 hours. I added
that to the color image (6 hours) taken last week to make an LRGB
this was a quick and dirty processing of the data using some old version
of photshop on my laptop.
I am curious to see how this will look when I can get back to my regular
computer for processing it.
Using the PL39000C one shot color in conjunction with the PL16803 for
luminance seems like a good way to go. The scope was an AP%%EDF f/7 with
the 4" field flattener
The Luminance was shot last night with about 83% of the lunar disk
illuminated. The skies were reasaonably transparent it seems.
That laptop monitor must be dying. The image is way too bright on mine
losing a lot of detail and color.
hmm, i just returned home and took a look at it on my monitor i will use to
process it afresh and it doesn't look too bright here
maybe your monitor is turned up a bit too hot? that may explain why your
backgrounds look pretty dark to me typically
anyway it is all academic because I plan to reprocess it today.
All your other images appear correct to me, just this one seems blown out.
I usually set my background to about a count of 15 or so out of 256. I
do like it rather dark rather than gray. This new monitor does show the
darker levels better but using a 24 step gray scale each level is
virtually an identical increase in brightness.
Rick
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Third character is a zero rather than a capital "Oh".
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