Rudolf Ruehl

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E. Leitz Photographic Patents by Rudolf Ruehl

  • 1966 MAR 28 - PHOTO LENS WITH A SHORT FOCAL LENGTH AND LARGER BACK INTERCEPTOR FOCAL LENGTH (7 / 5 - see above left and 35mm f/2.8 Elmarit-R I)
  • 1972 MAR 22 - WIDE ANGLE LENS (8 / 8 - see above right and 28mm f/2.8 Elmarit-R I)
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