Archived posting to the Leica Users Group, 1996/08/14
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]The 8/15 Hologon is a 3/3 design dating from 1966 (DP 1241637); Kingslake regards it as a development of the Roosinov design of 1946, best known for its use by the famed Dr Ludwig Bertele in his Aviogon and Postwar Biogon designs, though he does note that it could also be regarded as a reversed triplet. In any event, it shares little with the Gaussian roots of the Topogon. The current 8/16 Hologon is an assymmetrical lens of 5/3 design, apparently descended from the 8/15 design. The older 8/15 lens covered 110 degrees, the current one 106 degrees. In ANY event, this is hardly a 'rather old' design. Marc msmall@roanoke.infi.net FAX: +540/343-7315 Cha robh bas fir gun ghras fir!