Tessar 50 2.8 Carl Zeiss Jena DDR a great small lens
Sony 77 eats that 42 mm lens in a perfect way!
That type was manufactured starting about 1984 (DRESDNER CAMERA).
This later type of a M42 lens has a minimal focus distance of 35 mm.
It has a switch to select the aperture manually.
Its a lens with 4 elements in 3 groups.
GREEK WORD TESSARES = 4
The faster lenses with 3.5/2.8 was developed by Ernst Wanderleb/Willy Merte.
A lot of different types of Tessars were built
mostly for the PRAKTICA and EXAKTA cameras.
More details see below.
Some historical impressions about old Tessar lenses and cameras:
All shots were made with A = 2.8!
Minimum facus distance of 35 mm
Minimum focus distance 35 mm
A great small lens for a few Euros to play with.
Handling works well.