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P3D polarizers

Many thanks to several people who have responded off list - '

Allen W. also noted the following sources of information:

http://www.polaroid.com/products/oem/polarizers/pola-types.html


http://www.algonet.se/~bengtha/photo/filters_faq/filters.html#index

the first has a nice diagram, and the second has much practical
information - inluding a "twirled rope" analogy which seems fairly
intuitive, and how to tell if your polarizer is really linear or
circular.

Thanks!

--Bob Wier

       mailto:wier@xxxxxxxxxxxxxxxxx 
       12:01 PM Friday, July 30, 1999
     Unix/Internet Systems Administrator
    Rocky Mountain College, Billings, MT
      (currently in Ouray, Colorado)



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