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Re: [ATM] Re: ATM A new kind of folded Newtonian

To: "atml" <atm@atmlist.net>
Subject: Re: [ATM] Re: ATM A new kind of folded Newtonian
From: "Bob May" <bobmay@nethere.com>
Date: Tue, 20 Apr 2004 10:12:04 -0700
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Astigmatism doesn't happen when the mirror is reflecting directly back to
the primary as that design had.  It is only when there is a  path difference
as you go across the secondary that you get that astigmatism.
Bob May
http://nav.to/bobmay
bobmay@nethere.com
NEW! http://bobmay.astronomy.net


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References:
- [ATM] Re: ATM A new kind of folded Newtonian
  - From: mdholm@telerama.com

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