A better M27 Image (using AO-7)

Ray Gralak (ray@No-Spam)
Sun, 30 Apr 1999 20:53:36 -0700

I dragged out my SBIG AO-7 and put it on the back of my 5" refractor
after an Astro-Physics 2x barlow. Later I would determine from images that
the focal length is 2641 mm or f/20.84!

I was out to create a better M27 than I had a few nights before. I
used the RGB data from that night which was taken at f/16 and 2x2 binned
(effectively f/8 scale) and combined it with 90 minutes of AO-7 data
collected last night from my backyard. I actually tried to expose about
twice that much data but for some reason Maxim was not reacquiring the
guide star *sometimes* between exposures (actually, half the time). I'm
sure this must be from something I don't have set up right.

I feel this is the absolute best image of M27 I can do from my backyard
with my 5-inch refractor. For those who try something like this I warn
you again that this technique will only work well on bright objects!

http://www.gralak.com/Astro/M27-LRGB-FS128-AO7.jpg

Take care,

-Ray Gralak


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