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Re: [ATM] lensmaker for a very long focus objective

To: atm@atmlist.net, bstephenson@adlernet.org
Subject: Re: [ATM] lensmaker for a very long focus objective
From: Michael Lindner <mikell@optonline.net>
Date: Fri, 26 Mar 2004 17:46:42 -0500
In-reply-to: <200403261008.01224.mikell@optonline.net>
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On Friday 26 March 2004 10:08 am, Michael Lindner wrote:
> Without something to keep the two
> components (objective and eyepiece) a fixed distance from and square to
> each other, viewing would be impossible.

Having said that, I just picked up my copy of Peter Manly's "Unusual 
Telescopes" and it opened to the page (p. 92) describing Huygen's 
"pole-and-rope" telescope. A rope was stretched taught between the pole 
mounted objective and the eyepiece to keep them aligned and at a fixed 
distance.

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

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Follow-Ups:
- Re: [ATM] lensmaker for a very long focus objective
  - From: "Bob May" <bobmay@nethere.com>

References:
- [ATM] lensmaker for a very long focus objective
  - From: Peter Abrahams <telscope@europa.com>
- Re: [ATM] lensmaker for a very long focus objective
  - From: Michael Lindner <mikell@optonline.net>

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