Data sheet: Carl Zeiss Jena Triotar 135 mm f/4

Pekka Buttler, 01/2023

Carl Zeiss Jena Triotar 135 mm f/4 (from between 1952–1955) with a Praktina mount


The table below summarizes the lens’ key specifications (measurements based on pictured lens):

Brand:Carl Zeiss JenaLens nameTriotar 4/135 T
Focal length(s)1135 mmAngle-of-view218 °
Maximum Aperturef/4In Production1938–≈1953 (all variants)
Lens mountsContax/Kiev, Exakta, Exakta66,
LTM, m42, Praktina
Subfamily (if applicable)––
Length3125,5 mmDiameter463,8 mm
Filter ring diameter49 mmWeight461 grams
Lens element count3Lens group count3
Aperture blades (S/R/C)515 SFocus throwxxx °
Minimum focusing distance1,1 mMaximum magnification1:6,0
Has manual aperture ringYESHas Manual focus ringYES

Further notes:
• That Carl Zeiss Jena introduced the 135/4 Triotar in 1938 seems odd (to say the least) as they were already offering similar spec’d (135/4) Sonnar lenses, that were more compact and sported better IQ.
• That said, many deem the 135/4 Triotar to be testament to what skilled designers could achieve with a simple triplet.

History of Carl Zeiss Jena

There are few names in camera optics more illustrious than that of Carl Zeiss. The company was founded in the German town of Jena in 1846 by Carl Zeiß (hence: ‘Carl Zeiss Jena‘). During 1846–1945 there are few major developments in lens optics that the company was not involved in. Names that are even today well-known in optics – such as Planar (1896),