From: DROWESMI{at}aol.com
To: atm{at}shore.net
Reply-To: DROWESMI{at}aol.com


Hi David,

> thanks for the tips.  I do have a used 125mm meade
>  maksutov cassegrain scope (spotting model not astro
>  model), given as a gift, which I can cannibalize for
>  parts if anything is useful.  The cassegrain mirror is
>  a slow spherical surface, right?  Although smaller in
>  diameter, could I use that for quick 'spot checks' as
>  the other poster suggested?

No, sorry.  The Cassegrain primary is likely to be an f/3 or faster sphere
and is useless for this application.  You will need a paraboloid to test
your flat and it should be at least 8" in diameter, perferably larger.

-Dave Rowe-

--- BBBS/NT v4.00 MP