(ATM) What to do with .......

[Bob Madden <madden@netcom.com>]

Ok, so I have this very small 4-inch SC blank with some grinding on it. I 
got it at RTMC/Celestron table for $3. A friend has a Ritchey Creithen 
and it is interesting. I've been thinking of making this little jewel 
into a small version if my friends only I'd like to increase the focal 
length to f-10 (I think). I don't want to fuss with a corrector plate, so 
what am I up against in this project? Any suggestions Bratislav or Mel or 
or Steve T. or anyone else. Where do I go to get formulae to design this 
thing. Will the secondary be too difficult to make? and on and on ........... 
Any advice will be greatfully received.

Friendly Bob

):-{])) <----   madden@netcom.com
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