ATM 16" f0.5 Spherical mirror

[Kevin M Whitefire <kwhitefire@juno.com>]

The thought of having a cass with a primary f/D of 7 or 11.5 isn't
something I can imagine as being near practical.  The final f/D would be
very large.

They're possibly useful in making a gargantuan Gregorian variety
telescope with a 40"+ primary mirror.  This would also be impractical,
but from a dreamer's point of view, perfect.

Now, would it be possible to put a lens or lens system in the optical
path to correct the spherical aberration, say, just before the light
enters the focuser of a Newt configuration?  If so, a really nice
longer-focus Newt is possible and easy.  Most of the work is already
done.

Kevin of Eastern Iowa
Seeker of the Darkness

The thorn of a rose seeks the blood of a woman.

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