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Re:ATM Cassegrain as second telescope project.

To: kwhitefire@juno.com
Subject: Re:ATM Cassegrain as second telescope project.
From: Steve Beccue <lsteve@daffodil.beccue.org>
Date: Tue, 6 Aug 2002 20:57:36 -0700 (PDT)
cc: suzyj@bigpond.com, atm@shore.net
In-Reply-To: <20020805.204510.25058.9651@webmail3.wlv.untd.com>
Reply-To: Steve Beccue <lsteve@daffodil.beccue.org>
Sender: owner-atm@shore.net




Could you please expand on this?  I am considering a RC for a 32".  At
what f/D is the primary separately useful?  




> 
> If you're going to do a variation on the theme of a Cass, go with a Ritchie-Chreitien.  It 
> has no coma, and if you make it with a long enough f/D it will have a
> separately useful primary mirror.  Difficulty is slightly greater than
> with a classical Cass, but the optical system is far superior to a DK.

Follow-Ups:
- Re: Re:ATM Cassegrain as second telescope project.
  - From: "Ken Hunter" <kb7h@onemain.com>
- Re:ATM Cassegrain as second telescope project.
  - From: William Mc Hale <wmchal1@umbc.edu>

References:
- Re:ATM Cassegrain as second telescope project.
  - From: kwhitefire@juno.com

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