RE: [ATM] Off-centered Mirrors?

["Richard Klappal" <klappal@xnet.com>]

You can experiment with the viewing quality by making an off-axis mask for
your newt where the opening fits between the spider legs.  While perhaps not
exactly the same result, a few minutes with a razor and a sheet of cardboard
is a lot easier than trying to grind one.



-----Original Message-----
From: atm-bounces@atmlist.net [mailto:atm-bounces@atmlist.net]On Behalf
Of Michael Lindner
Sent: Saturday, 23 October, 2004 22:35
To: DHA352@aol.com; atm@atmlist.net
Subject: Re: [ATM] Off-centered Mirrors?


On Saturday 23 October 2004 03:54 pm, DHA352@aol.com wrote:
> Has anyone tried an off-centered mirror?

What you are describing is an "unobstructed" or "off-axis" netwonian. I have
not personally tried making one, but I understand they are hard, as the
curve
is not a figure of revolution. There is a commercial manufacturer, at
http://users.erols.com/dgmoptics/

Clear skies.
--
Michael Lindner
http://www.starastronomy.org *** http://home.att.net/~mikel
http://www.atmsite.org *** http://www.atmlist.net

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