Re: [ATM] Large Schmidt Camera?

["Jim" <jim@idexer.com>]

From: "David Sleeter" <d.sleeter@adelphia.net>

> Hi Folks:
>
> I have a 16-1/2" dia. F-2.5 spherical Cassegrain-style (hole in the 
> middle)
> mirror, and I'm wondering if there are any off-the-shelf combinations 
> of
> field flattener and CCD camera with which it could easily be used as 
> a
> Schmidt camera? I'm thinking in particular about Celestron's Fastar
> equipment. I guess the trick would be finding a field flattener that 
> works
> with an F-2.5 sphere. Any suggestions would be appreciated.

It won't be easy to make a cammera with that mirror and would be 
costly. Better option is to buy a Meade SN-10 Schmidt newtonian to 
modify into a optically perfect Schmidt Cammera that will put a RC of 
comparable size to shame. With the corrector plate moved 1300mm from 
the mirror and a 50mm ED objective lens placed 47mm before the CCD 
creates awsome coma free flat field photos that craps all over a RC 
wide field photo :-)

Best of all the modification is easy enough for most to do themselves 
without spending a fortune.



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