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Re: [ATM] Flat Field Cass with Hougthon subaperture corrector.WAS:corrected dall-kirkham telescope

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Subject: Re: [ATM] Flat Field Cass with Hougthon subaperture corrector.WAS:corrected dall-kirkham telescope
From: "John Sherman" <atmer@johnspics.com>
Date: Thu, 8 Feb 2007 15:02:28 -0800
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Hi Richard,

> There is nothing new about correcting Cassegrain type constructs 
> with lens elements. 

Very true! Here's an example:

http://astro.umsystem.edu/atm/ARCHIVES/NOV00/msg00249.html


John






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References:
- Re: [ATM] Flat Field Cass with Hougthon subaperture corrector. WAS:corrected dall-kirkham telescope
  - From: Gregg Swanson <Gregg.Swanson@microsoft.com>
- Re: [ATM] Flat Field Cass with Hougthon subaperture corrector. WAS:corrected dall-kirkham telescope
  - From: Dominic-Luc Webb <dlwebb@canit.se>
- Re: [ATM] Flat Field Cass with Hougthon subaperture corrector. WAS:corrected dall-kirkham telescope
  - From: Richard <cnc@cncservo.co.uk>

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