Re: ATM How much obstruction?

["Bill Kelley" <flex@commspeed.net>]

All,
Too bad about hte edge and zones- otherwise flexing the mirror might give
a useful optic.
Bill


>
> I bought one of these mirrors - supposedly a 1/8 wv. pv.  Upon testing, it
> was spherical with about 1/4" TDE and a couple of zones.  I tested another
> that a friend bought and it was spherical as well.
>
> -Cary
>
>
>
> > I'm thinking of building a telescope using one of those cheap 8" f3.7
> > mirrors from Ebay.  (I really need a project and don't have much money
> right
> > now).
>
>
>