From: "Richard F.L.R. Snashall" 
To: ATM List 
Reply-To: "Richard F.L.R. Snashall" 




Richard F.L.R. Snashall wrote:
 >
 > Is a Petzval Design normally this long:
 >
 >     http://users.rcn.com/rflrs/fpl_hext1-15x.len
 >
 > If so (f/8.5 length for f/6 telescope), why is it liked
 > so much?
 >
 >     Rick S.
 >
 >

I added another one (f/8 length for f/6.4 telescope).

        http://users.rcn.com/rflrs/fpl_quint1-23x.len

Five lenses this time, with a flat field.

                Rick S.

 >
 >

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