Rudolf Ruehl

From Leica Wiki (English)
Jump to navigationJump to search

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)
  • 1972 MAR 22 - WIDE ANGLE LENS (8 / 8 - see above and 28mm f/2.8 Summicron-R I)