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Re: [ATM] Another flat-field anastigmatic aplant

vladimir wrote:

>
>
>Secondary size is small to begin with (less than 17% the primary 
>linear size in this particular system).
>

>
>If ~1-degree fully illuminated field (and somewhat wider useable field) 
>is large enough, central opening somewhat larger than 0.4D 
>should do.
>

Interesting -- the limiting issue is then the central opening
and not the secondary diameter.  Do you think the design could
be adjusted to make them of equal import?  (Would that sort of
make the design optimal in some sense?)
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