[ATM] 20" F/3, updates

[Mark Cowan]

Ok, I just have to ask - could you possibly share here what you discovered in working it twelve times?  This sounds like the kind of thing I do!

Best,
Mark


--- On Fri, 2/6/09, Mel Bartels <mbartels at bbastrodesigns.com> wrote:
> In it I feature images of the 13
> inch f/3.0 mirror
> that I recently completed.  Incidentally, I parabolized the
> mirror twelve
> times in order to systematically study different approaches
> to figuring.
>