Re: [ATM] Celestron 20" R-C telescope

[Michael Peck <mpeck1@ix.netcom.com>]

At 11:38 04-05-04 -0400, artbianconi@blast.net wrote:

>The orginal photos I took are too large for transmission so I've
>attached some lower resolution JPG's. I am trying a different
>graphical encoding method, please let me know if the images were
>satisfactory.
>

Anacortes has some pictures on their web site at 
<http://www.buytelescopes.com/product.asp?m=&pid=6915&display=images>. No I 
don't work for them or Celestron and the link is provided FYI only.

A quick google around found this photograph 
<http://subarutelescope.org/photo/telescope2.jpg> and CAD drawing 
<http://subarutelescope.org/photo/tele_illust.gif> of the Japanese Subaru 
telescope. You might notice a slight similarity in truss design.

One small quibble by the way. Celestron is calling this a "corrected 
Dall-Kirkham" design. If you look closely at the pictures there appears to 
be a lens assembly sitting near the top of the primary baffle. That's 
probably why it's so inexpensive.

I think Wynne published some designs for corrected spherical secondary 
telescopes many years ago. That may be where they got the idea, or perhaps 
they swiped (or maybe even paid for) one of Peter Smith's designs.

Mike Peck

_________________

Michael Peck
email mpeck1@ix.netcom.com
Wildlife photography page http://home.netcom.com/~mpeck1/index.html
Amateur telescope making http://home.netcom.com/~mpeck1/astro/astro.html

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