Re: ATM 14.5 i.s.........polished.........

[Ken <lowther@worldnet.att.net>]

natsp wrote:
> 
> you can tell its polished when you dry
> it and it still looks wet!
> im going to polish it a little more.
> with the foucault it now looks verry
> smoth and even, like a ball.
> where before it looked like a speaker.
> still reading on the foucault.
> still dont understand it.
> how do i use it to measure focal legnth?
> take care

It is one half the distance to the KE from where you get that nice
'ball'.


-- 
Ken Lowther
Youngstown, Ohio
http://www.atmsite.org
ATM FAQ and more
Good starting place for amateur telescope makers