From: rrllff@yahoo.com   
      
   On Friday, August 14, 2015 at 10:39:39 AM UTC-4, Phil Hobbs wrote:   
   > I don't think I'd try using one in an imaging application, for all the   
   > reasons you give.   
   >   
   > Cheers   
   >   
   > Phil Hobbs   
      
   I should have said visual system which can be quite forgiving.   
      
   http://www.richardfisher.com   
      
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