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

I'd like to see the details on the corrector... I have 20 inch Fused Quartz blanks, 6.25 inch Cervit blanks and lots of small Quartz off-cuts that could be made into corrector lenses...
   
  Ken Hunter
   
  

Dominic-Luc Webb <dlwebb@canit.se> wrote:
  
Checking the link to the (corporate ?) website, the theoretical
spot diagrams are truly impressive, as are the 20" aperture and
32000 USD pricetag. Has anyone on the list here built such large
aperture catadioptric system, and actually get a result that
approaches this (I have not)?

Dominic-Luc Webb



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