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Re: [ATM] Un-SPAM

Richard F.L.R. Snashall wrote:
>
> This design is a rework of a double-cemented Petzval to 100 mm
> f/8.  The glasses are "common", but not the ones you listed:
> N-K5, F2, and N-SF5.  I chose them for their expansion rates
> and the fact that, by tweaking the color correction, they allow
> for both lenses of the Petzval to be cemented.

However, if you are less concerned with the expansion rates and
can forego having both crowns isoconvex:

    http://users.rcn.com/rflrs/Ptz09-12x.atm   ATMOS input file
    http://users.rcn.com/rflrs/Ptz09-12x.len   OSLO input file
    http://users.rcn.com/rflrs/Ptz09-12x.txt   TEXT prescription
    http://users.rcn.com/rflrs/Ptz09-12x.zmx   ZEMAX input file



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