[rollei_list] CZ "Camera Lens News Nº13" T* and HFT

  • From: CarlosMFreaza <cmfreaza@xxxxxxxxx>
  • To: rollei_list@xxxxxxxxxxxxx
  • Date: Fri, 4 May 2012 17:57:54 -0300

I recall again an article written by Kornelius Fleischer from Zeiss
for the CZ magazine in 2001 about T* and Rollei HFT:


Carl Zeiss "Camera Lens News Nº 13, Spring 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 anti-reflection 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. "
Camera Lens News No. 13, Spring 2001, Kornelius J. Fleischer, Redactor

Carlos
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  • » [rollei_list] CZ "Camera Lens News Nº13" T* and HFT - CarlosMFreaza