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Re: [ATM] Fast primary unobstructed telescope



Quoting Kevin Whitefire <chaosopher23@yahoo.com>:

> I have a primary that's 13.25" in diameter with f/D of
> 3.125, give or take a little.  Its exact ratio isn't
> closer than a quarter inch accuracy, using a solar
> focus on a white surface.

And you state it as 3.125? ;-)


Hermit, holed up in Youngstown, Ohio
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