Wikipedia
Voigtländer is an optical company founded by in Vienna in 1756 and is thus the oldest name in cameras. It produced the Petzval photographic lens (the fastest lens at that time: f/3.7) in 1840, and the world's first all-metal daguerrotype camera (Ganzmetallkamera) in 1841, also bringing out plate cameras shortly afterwards. It set up a branch office in Braunschweig in 1849, moving its headquarters there later. The company issued stock in 1898, and a majority of the shares were acquired by Schering in 1925.
Over the next three decades, Voigtländer became a technology leader and the first manufacturer to introduce several new kinds of product that later became commonplace. These include the first zoom lens for 35mm still photography (36–82/2.8 Zoomar) in 1960 and the first 35mm compact camera with built-in electronic flash (Vitrona) in 1965.
Schering sold its share of the company to the Carl Zeiss Foundation in 1956, and Zeiss and Voigtländer integrated in 1965. In 1972 Zeiss/Voigtländer stopped producing cameras, and a year later Zeiss sold Voigtländer brand to Rollei. On the collapse of Rollei in 1982, Plusfoto took over the name, selling it in 1997 to Ringfoto.
Since 1999, Voigtländer-branded products have been manufactured and marketed by Cosina; for these, see Cosina Voigtländer.