camera obscura, Guillermo Penate

Hi Guy:
   
  1) Have you ever given any thought to what 'pinhole constants' result from the sizes of apertures use effectively for cameras obscuras? I don't know enough about the dimensions people use. I think that would be interesting rule-of-thumb to keep. I'm still working on a pinhole calculator that's 'different', using graphical interfaces (sliders) for 'what if' scenarios, allowing user adjustment of parameters with results changing in a table.
   
  2) Do you know a working email address for Guillermo Penate? That ca.geocities.rogers blend/absorption/whatever has made him a bit under the radar.
   
  Thanks
   
  Murray
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Received on Wed Feb 20 18:10:28 2008