Re: ATM 16" F/33 valid design?

[Ric Rokosz <radicell2@yahoo.com>]

--- Peter John Smith <pjifl@bigpond.com.au> wrote:
>
> Somewhere in the Archives is set of of data I
> calculated about an extremely
> high F:NO Cass made by using a standard lens as the
> secondary. It is hazy
> now, but there was performance data on a series of
> F:NOs.  It is vaguely
> interesting and would not be hard to try.
>
> From memory, the writer of the article was trying to
> patent some aspect of
> it !!!!!!!!!

Yes,he did patent it - the use of the really small
secondary for long focus scopes, ....can you believe
it. The US patent office is a joke...

Ric

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