Archived posting to the Leica Users Group, 1997/07/15
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 08:13 PM 7/15/97 -0400, Richard Clompus, O.D., wrote: >Can you image Professor Max Berek having to design by >hand the first 5cm f 3.5 Anastigmat lens for the earliest of Leicas? But that's how it was done, way back in the long-ago. The original Anastigmat is a Tessar clone; the original Tessar took Drs Paul Rudolph and Ernst Wandersleb SIX YEARS to calculate -- and that was in its original f/6.3 form! It took Wandersleb an additional twelve years to fine-tune this design to allow it to be opened to f/3.5. When Dr Ludwig Bertele, arguably the finest optical designer of this century, calculated the original Sonnar, the 2/50 Contax lens, the mathematical scribblings totted up to a total of more than 3 feet in depth. A picture of this stack was much a feature of early Zeiss Ikon advertising for the Contax I. Marc Marc James Small Cha Robh Bas Fir, Gun Ghras Fir! FAX: +540/343-7315