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Re: [ATM] f/4 Design

Richard F.L.R. Snashall wrote:
>
> Not large, but the field (8 degrees -- 42 mm) is flat.  All lenses
> are plano or iso with common glass types.  It is relatively good
> zonal correction and low lateral color.  Visual Strehl ends up
> being from 0.6238 to 0.1625.
Maybe you'd want slightly larger (100 mm f/4) and using very familiar
glasses for one of your new year's projects:

    http://users.rcn.com/rflrs/Ptz10-69x.atm   ATMOS input file
    http://users.rcn.com/rflrs/Ptz10-69x.len   OSLO input file
    http://users.rcn.com/rflrs/Ptz10-69x.txt   TEXT prescription
    http://users.rcn.com/rflrs/Ptz10-69x.zmx   ZEMAX input file

With the smaller field (6 degrees instead of 8, but still 42 mm),
performance is more uniform across the field, 0.5728 to 0.3047.
Yes, it's still considered anastigmatic on a flat field.

Happy New Year!
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