Xenar

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Xenar is a trademark registered for Schneider-Kreuznach in 1920 for a photographic lens. With the brand a series of lenses from Schneider was named after the pattern of by Paul Rudolph developed 4 lens elements Tessars is constructed. The first Xenars with an aperture ratio of 1: 4 were introduced in 1919, i. H. introduced six years after Schneider was founded. The lens is comparatively compact and has an angle of view of 60 to 62 ° (wide-angle lens). It was produced by Schneider until the late 1990s.

  • Xenar 50mm f / 2.8

  • Xenar 50mm f / 3.5

  • A - small - Xenar on an Edixa camera

  • Tele-Xenar 1: 3.5 / 90 mm for the small picture with a different construction

Albrecht Wilhelm Tronnier succeeded in making an important improvement to the Xenar in 1935. For the 35mm format he was able to increase the light intensity to 1: 2.8 for wide-angle and normal lenses; for medium format lenses up to 1: 3.5 (DRP 667453, DRP 753329 as well as US patent 2,084,714).

Tele Xenar

Tele-Xenars with focal lengths of 250 and 360 mm for large format photography also have the typical Tessar structure. This did not apply to Tele-Xenare for the 35mm format (see illustration). For the medium format ( Rollei ) Tele-Xenare 1: 4/150 mm, 1: 2.8 / 150 mm and a 1: 4/300 Apo-Tele-Xenar were available.

Individual evidence

  1. ^ Entry "Xenar" in the German trademark register; available online; Retrieved September 5, 2011
  2. ^ Kingslake, Rudolf (1889) The History of the Photographic Lens. Academic Publishers Inc. p. 88
  3. ^ Kingslake, Rudolf (1989) The History of the Photographic Lens. Academic Publishers Inc. p. 279
  4. ^ Entry "Xenar" in the Schneider-Optik lens database , accessed on September 5, 2011
  5. ↑ H.-M. Brandt (1956) The Photo Lens. Structure and mode of operation of the most important brand lenses in world production. Friedr. Viehweg & Sohn, Braunschweig. P. 137
  6. ↑ Tele-Arton - Tele-Xenar. Product brochure in Schneider-Kreuznach's online archive ( memento of October 2, 2011 in the Internet Archive ), accessed on September 5, 2011
  7. ↑ Peter B. Williams (2001) Medium format cameras: user's guide to buying and shooting. P. 85