From: "Marco Miglionico" 
To: "Goran Hosinsky" ,
        
Reply-To: "Marco Miglionico" 


An ambitious task for a frist mirror. Don't go thinner than 25mm.
Even mount this thickness of glass
on a 9 point cell for planetary viewing. Good luck in getting a better than
1/8 wave paraboloidal figure.

Marco Miglionico

www.geocities.com/telescopiman

----- Original Message -----
From: Goran Hosinsky 
To: 
Sent: Wednesday, May 07, 2003 8:33 PM Subject: ATM First mirror prjoject, how thin?


>
> Hi,
> I am collecting materials for my first mirror project, a 8" f/10 newton
> for planetary
> observations (http://www.arksky.org/newtnotes.htm). My first plan was to
> buy a
> kit but I find that postal rates from the US to the Canary Islands are
> rather
> prohibitive. Now I am thinking of buying a piece of plate glass locally
> and  cut out
> the blank.
> The thinner the glass, the easier it is to find and it is cheaper. What
> is the minimum
> thickness I should look for?
> Goran
>
>
>

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