RE: [ATM] Re: considering new design FW: Re: website down

["Jerry" <wa4guu@verizon.net>]

	I don't think there would be a much smaller obstruction particularly
in smaller apertures. The mirror is at an angle and you have to allow room
for glass thickness and a cell of some sort and a focuser. Then it would be
nice to have some head and body heat clearance from the mirror and the light
path. Lets be fair and not compare the obstruction for the "new" design
planetary scope obstruction with a Newtonian designed for deep sky. If you
only want a narrow field you can reduce the diagonal on a Newtonian to about
the same size as the hole you would need in the flat.

	It would be an expensive and heavy way to avoid spider diffraction 

	Jerry



-----Original Message-----
From: Donald Good
 
Don't say YIKES just yet.  Let's look at this for a moment.  This is almost
a zero obstruction (8% vs. the normal 20-30%), 


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