[Leica] Seven element RF Summicron versions (more)

[aglang@sprynet.com]

Erwin,

Was going through my stack of  Viewfinder's and found that article:

For your information;

(please excuse me if you have the article)

VIEWFINDER Vol 22, No. 1, 1989

Article by Walter Mandler D Sc.:

LEICA LENSES AND EARLY COMPUTERS

on page 11:

"A formidable task was already waiting for the new computing power: to re-design 
the Summicron 50mm f/2 for better performance at close-up distances.  The result 
of these calculations was the second version of the Summicron 2/50, available 
both as rigid mount and dual range lens, ( The second version has a longer 
distance from the first surface to film.) Other concurrent and subsequent 
designs done on the Z5 computer were the Elmar 2.8/50 and Summilux 1.4/50."

hope your tests include close-up performance.

Cheers!

Adam