On Wed, Aug 27, 2008 at 2:31 PM, Randy Muller <randygmuller@No-Spam> wrote:
> fr * Pex = FL
>
> where
>
> fr = focal ratio of objective
> Pex = exit pupil
> FL = focal length of objective
Oooops.
FL = focal length of eyepiece, of course!
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Received on Wed Aug 27 15:01:40 2008
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