Zeiss Contax Biogon 4,5/21mm

Carl Zeiss Oberkochen Contax BIOGON 21mm f/4.5 rangefinder (RF) ultra-wide-angle lens, made in 1956.

Designed by Ludwig Bertele and based on the legendary Russar MR-2 5,6/20mm lens made by KMZ in USSR and designed by the russian optical genius Mikhail Mikhailovich Rusinov.

Photo credit: © WestLicht Photographica Auction