Est. 1846 · Jena, Germany · 5 lenses
Carl Zeiss founded his workshop in Jena, Thuringia in November 1846, initially producing simple microscopes. The partnership with physicist Ernst Abbe in 1866 transformed the company into a science-driven enterprise, applying Abbe's wave-optics theory and sine condition to lens computation rather than relying on the trial-and-error grinding of the previous era. The 1884 founding of the Schott glassworks next door — Otto Schott's collaboration with Abbe and Zeiss — gave the workshop access to a rapidly expanding catalog of barium-crown and lanthanum-bearing glasses that no competitor could match.
This materials-and-theory foundation produced the most influential lens formulas in photographic history. Paul Rudolph computed the Anastigmat (1890), the symmetrical Planar (1896), and the four-element Tessar (1902) at Zeiss Jena; the Tessar's name (from Greek tessares, 'four') became synonymous with sharp, well-corrected medium-aperture optics for the next century. Ludwig Bertele — working at Ernemann in Dresden and then at Zeiss Ikon Dresden after the 1926 merger that consolidated Ernemann, Goerz, Ica, and Contessa-Nettel under Zeiss capital — designed the Ernostar and then the Sonnar (1932), a fast triplet-derived telephoto whose minimal air-glass count made it the highest-contrast fast lens of the pre-coating era.
World War II split Zeiss in two. In April 1945, U.S. forces evacuated 126 Zeiss managers and senior optical scientists from Jena to Heidenheim — the seed of the Oberkochen operation in the West. The Jena works fell into the Soviet occupation zone and continued under East German administration as VEB Carl Zeiss Jena, supplying lenses for Praktica, Pentacon, and Exakta SLRs and for Pentacon Six and Praktisix medium-format cameras. The Jena lineup — the Pancolar 50 mm f/1.8 / f/2 normal, the Flektogon 35 mm f/2.4 and 20 mm f/2.8 retrofocus wides, the Sonnar 135 mm f/3.5 short telephoto, and the Biometar 80 mm f/2.8 for the Pentacon Six — earned a reputation for excellent optical quality at modest prices in the West and remained popular long after the Wall fell.
The Cold War split ended with German reunification: the East German Carl Zeiss Jena combinate was reorganized in 1991 and merged back into the Carl Zeiss Foundation. Photographic lens production at Jena largely wound down, with most consumer-photographic activity consolidated at Oberkochen, although Carl Zeiss Jena GmbH continues today as a Zeiss-group subsidiary specializing in industrial and astronomical optics from the original Jena site.
Notable designs: Tessar 50mm f/2.8, Planar 50mm f/1.7, Sonnar 50mm f/1.5, Sonnar 135mm f/3.5, Pancolar 50mm f/1.8, Flektogon 35mm f/2.4, Flektogon 20mm f/2.8, Biometar 80mm f/2.8