Topcon UV lenses

Jump to: navigation, search

The UV mount lenses from Tōkyō Kōgaku were produced from the 1960's specifically for the Topcon Wink Mirror S and Topcon 100 Auto/Uni, and further used by the Unirex and the 1970s IC-1 Auto.

These unique lens designs do not have an aperture setting ring, as this is found on the camera body. The maximum aperture of the lens is "dialed-in" to a camera body mounted control when the lens is first fitted. This sets a maximum aperture parameter for the camera's exposure system. All Topcor UV lenses have a common minimum aperture of f/22.

UV stands for Ultra Violet, as the lenses had a UV coating, and did not need a separate UV filter.

Later variants of standard lenses where marked Hi Topcor.

It appears that the standard lenses all had six elements.

  • UV Topcor 28mm f/4
  • UV Topcor 35mm f/3.5
  • UV Topcor 50mm f/2 [1]
  • UV Topcor 50mm f/2 (Hi Topcor) [2]
  • UV Topcor 50mm f/2.8 [3]
  • UV Topcor 53mm f/2 [4]
  • UV Topcor 55mm f/1.8 (Hi Topcor) [5]
  • UV Topcor 100mm f/4
  • UV Topcor 135mm f/4
  • UV Topcor 200mm f/4


  1. The Unirex was sold with a bespoke silver finished 50mm f/2 lens on the chrome camera bodies, or a standard black barrel lens on the black camera bodies.
  2. This lens was supplied with the first version of the IC-1.
  3. This lens was Supplied with the Unirex EE. Some versions bear the Hi Topcor marking.
  4. This lens was supplied with the 100 Auto/Uni and Wink Mirror S.
  5. This lens was supplied with the second version of the IC-1.