Re: [ATM] Need Design Suggestions for a 16" f/1.1 Spherical Mirror

["Richard F.L.R. Snashall" <rflrs@rcn.com>]

Ken Hunter wrote:

>Matt,
>
>I don't see a good use for that glass except as a
>possible Hindle spherre in it's present configuration
>unless you want to turn it back into a communications
>collimator. I thought hard about purchasing one of
>those from eBay and unless you want to regrind it,
>it's not very useful except for an ant burner or a
>Hindle sphere. 
>
>Ken Hunter
>
>
I think I tend to agree with this.  I was able to find a somewhat
reasonable all spherical design where the secondary is a Mangin
triplet (a touch faster than the one at the site you noted):

   http://users.rcn.com/rflrs/rc3-50x.atm
   http://users.rcn.com/rflrs/rc3-50x.len
   http://users.rcn.com/rflrs/rc3-50x.txt
   http://users.rcn.com/rflrs/rc3-50x.zmx

but not one that would push the primary anywhere near that fast.
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