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Stephans Quintet in RGB at 0.45"/pixel (3366mm)

12.5 hours total exposure made from 300 second subs.

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Comment by Jeffrey P Nunnari on November 4, 2011 at 10:45am
Awesome.
Comment by Richard Crisp on August 10, 2011 at 10:43am
I need two things to do this right
1) good seeing
2) calm winds.

the wind is a big problem for my 18" cass. That's one of the key benefits I expect when I finally get my observatory built.
Comment by Kevin Galka on August 10, 2011 at 10:30am
Awesome shot! I remember the first time I tried imaging this... lets just say there's a reason why I don't have a post of it on this site! lol :) A lot more difficult than I imagined.
Comment by Richard Crisp on June 30, 2011 at 9:57pm
the wind really bothers the big cass, even on an AP1200

so I just reduced the exposures a bit so I would lose fewer of them to bad guiding.

it just takes more total exposure time to get to a given SNR when you do it that way.
Comment by Marc Basti on June 30, 2011 at 9:40pm
What a great pic, really like the way out there stuff. How did you decide on 5mn exposures? Marc

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