648e540b   
   From: rongibbs@talktalk.net   
      
   "Wade Kelman"  wrote in message   
   news:927a1214-8df1-4ae7-b9d3-a6a7364ec3f1@a11g2000pri.googlegroups.com...   
      
   > Warren Smith has a great chart in his books which plots field coverage vs.   
   > numerical aperture, and places a number of optical designs on the   
   > chart.   
      
   I seem to remember seeing that, but can't find it now. I have a copy of   
   Modern Optical Engineering 3rd Ed. (not MLD), but I can't find this diagram.   
   Is it in there somewhere?   
      
   Ron   
   --   
   Gibbs Associates   
   Optical Design Consultant   
   www.gibbsassociates.co.uk   
      
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