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LightPolution
member
Reged: 08/15/08
Posts: 59
Loc: Greenwich, CT
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Re: Hyperstar
08/16/08 09:24 AM
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Thanks John. The reason is mainly resolution. I'd like to have the option of shooting at 2600mm (or 1638 with the focal reducer) for deep shots. I've shot through an FSQ before, and it was indeed very nice, but as you know considering the time you've been on this forum (5 years! wow!), aperature is king with imaging. Considering the scale of the oversampling at f2, I can't see the central obstruction being that big of an issue unless your camera has very small pixels. Perhaps I'm wrong. 
What I still would like to understand is how to determine the maxium resolution you can shoot at given the atmospheric conditions. How do you look up, furrow your brow, and say, "Yep, about mag 3 today.."
Then once you know the condition of the sky, how to you apply that to scope choice with a given pixel size? 
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