|
||
The top sketch shows the disassembly of the 58/2 Biotar with automatic diaphragm, in Exakta mount. The automatic Flektagon and Tessar lenses are similar in construction. 
Preset Lenses The sketches below are based on the 80mm f/2.8 Tessar in M42 Contax S mount, but the basic construction is typical of a number of Jena lenses of the early 1950s. 
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
