Interessantes zu Carl Zeiss (Contax/Yashica)

[softmachine]

... hier noch ein kleiner Nachtrag aus 2001:

Die Planar, Distagon, Sonnar-Objektive, die Rollei unter Lizenz von Carl Zeiss herstellt, sind alle HFT-beschichtet von Rollei.
Alle Linsen, die Carl Zeiss für Rollei im Zeiss Oberkochen-Werk herstellt (Stand 2001), sind tatsächlich Zeiss T* beschichtet.
Die Bezeichnung für diese Linsen ist jedoch "HFT", um in der gesamten Rollei-Produktpalette vollständig konsistent zu bleiben.


In wie weit das schon -> vor 2001 <- der Fall war, wer weiss (?)






Hier der original Text dazu aus
Camera Lens News, Nr. 13 von Zeiss, Sommer 2001:




How do Zeiss T* and Rollei HFT compare?


Since this has recently grown into a frequently asked question
we feel it is appropriate to provide an official and unequivocal answer from Carl Zeiss:
HFT, meaning "High Fidelity Transfer", is a multi-layer anti-reflection coating system co-developed by Zeiss and Rollei.
This occurred several decades ago at a time when Zeiss T* coating was new on the market and could only be applied at the Zeiss Oberkochen
plant to rather small camera lens production batches. Rollei envisaged very large volume production in their then
new Singapore plant and therefore encouraged this joint development.


Today the situation is this: HFT has become a well established trademark for Rollei's proprietary multi-layer antireflection coating.
The optical performance of this Zeiss/Rollei co-development is so close to the performance of the original Zeiss T* that one can hardly
detect any difference in all practical picture taking.
The Planar&, Distagon, Sonnar lenses that Rollei produces under license from Carl Zeiss are all HFT coated by Rollei. All the lenses that Carl Zeiss produces for Rollei at the Zeiss Oberkochen plant are actually Zeiss T*. coated.


However, the designation on these lenses is "HFT"
in the interest of remaining fully consistent throughout the Rollei product range.






Publisher's Imprint
Camera Lens News
A newsletter for all who use, buy, sell, like,
report about and are interested in Carl Zeiss
No. 13
Spring 2001
A information in Camera Lens News is given
in the best of our knowledge at the time of
going to press, Technical specifications of Carl
Zeiss products are subject to change


Publisher
Carl Zeiss. Oberkochen
Camera Lens Division