Ultron

Ultron is the name of a lens designed by Voigtlander, and later Zeiss. The name is used by the Cosina Voigtlander lenses currently.

Ultron 50mm f2.0 lens Voigtlander Prominent II image by Süleyman Demir (Image rights)

The original "Ultron" was a 50mm f/2.0 lens with 6 elements in 5 groups designed for the Voigtlander Prominent camera. It was designed by A.W. Tronnier as an improvement on his own Schemider-Kreuznach Xenon (c.a. 1937) design. Ultron lenses were also used in the Vitessa cameras, Vito III, Vitomatic and others as a high end option over the Skopar.

When Zeiss took over Voigtlander a further design improvement by Tronnier resulted in the Ultron 50mm f/1.8 used in the Icarex camera and also available in M42 mount. This lens had an extra concave front element making it a 7 elements in 6 groups lens

Cosina Voigtlander

The name Ultron was reused in the early 2000 by Cosina Voigtlander

• 40mm f/2.0 Aspherical lens, a 6 element in 5 groups lens for SLRs.
• 35mm f/2.0, 35mm f/1.7, 28mm f/2.8 and Macro Ultron 35mm 1:2 for rangefinders and mirrorless cameras