Re: ATM 11.2" F/2 Primary testing questions :)

[Ric Rokosz <radicell2@yahoo.com>]

--- James Lerch <jlerch1@tampabay.rr.com> wrote:ex
>
> #2  With such a Fast Primary, I assume Foucault
> testing will be unsuccessful.  If so, would the Wire

Why f/2?
Go to f/3 and things get a lot easier.
For testing you might consider setting up a finished
12 inch (even a ten) scope in front of the 11 incher
and use the 12 as an infinite light source that gives
you a nulltest for a parabola. Verrrrry easy to test
such a fast primary then.
The need for such small figuring laps means you should
leave it in your will for your next lifetime to finish
it ..:)
Ric
Toronto,CDN

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