[rollei_list] AW: Re: Rolleiflex SL 35 E
- From: "Sven Keller" <keller.schaefer@xxxxxxxxxxxxx>
- To: <rollei_list@xxxxxxxxxxxxx>
- Date: Wed, 5 Mar 2014 22:03:46 +0100
Time is on Prochnow's side, isn't it?
Any Voigtländer development of a symetrical and electronic metal shutter
would have had to have taken place *before* 1972.
If it exists, it seems strange that Rollei did not take advantage of this
development for the subsequent Rollei and Voigtländer cameras, not even for
the electronic shutter SL35ME of 1976.
And after mid 1974 Rollei certainly had an own reason to develop such a
shutter, as documented by the SL2000 design model.
So to me, Prochnow's story sounds pretty logical, and having such a
development and not using it until 1977 (VSL 3-E) and 1980 (SL2000F) does
not.
Then again, Rollei did many strange things...
Regards,
Sven
-----Ursprüngliche Nachricht-----
Von: rollei_list-bounce@xxxxxxxxxxxxx
[mailto:rollei_list-bounce@xxxxxxxxxxxxx] Im Auftrag von CarlosMFreaza
Gesendet: Mittwoch, 5. März 2014 19:32
An: rollei_list@xxxxxxxxxxxxx
Betreff: [rollei_list] Re: Rolleiflex SL 35 E
Marc:
The Rollei electronic metal focal plane shutter was unique for its
symmetric design. Prochnow does not mention Zeiss Ikon or Voigtländer
regarding the new Rollei electronic shutter, he only mentions the engineers
and designers from Rollei and those coming from ZI/Voigtländer, working
together for the K-62 project, to create a new generation of Voigtländer and
Rolleiflex electronic cameras to replace the existent cameras. I wrote in my
previous post under the subject "Rollei electronic shutter and Rolleiflex SL
2000" the team members names. They started to develop the new shutter after
they knew about the cubic camera with the lens at the camera body center in
July 1974, it required an _unique_ electronic metal shutter with symmetric
design, it means the components to drive the shutter are on both sides of
the shutter.
Jan Böttcher in his Rollei Report pages shows drawings for this shutter with
patent numbers:
http://www.janboettcher.de/MuseumR3eng.html (from the middle of the page)
One of the main patents is this one:
https://docs.google.com/viewer?url=patentimages.storage.googleapis.com/pdfs/
US4110773.pdf
Erwin Scholz from Brunswick, Germany, appears as inventor and the patent
was asigned to Rollei Werke F&H. Erwin Scholz is one of the Rollei engineers
mentioned in my previous post as member of the team.
The patent is from August 29, 1978 USA and from July 22, 1976, in Germany.
Erwin Scholz, Rollei Werke, 1974-1976-1978 are saying something.
The Rollei Report 3, more than author's views or opinions, shows facts about
the Rolleiflex SL 2000. The page 44-850 has a photograph about the basic
design PR (Prochnow Register) 571/1, it's a perfect cube with a basis to
simulate a motor, the caption comments it's the first
1974 design from arquictecture studio Franzmann in Hamburg, "Rolleiflex" is
engraved in the body. The page 44-851 shows a photograph with frontal and
lateral view about the first 1976 prototype for the SL 2000, PR 571/2, this
protoype is provided with several details "Rolleiflex" and "SL 2000" is
engraved in the body.
The page 44-852 shows a photograph about the 1977 prototype from Ernst
Moeckl, the camera body is engraved with "Rolleiflex" and "SL 2000 E".
The page 44-853 shows a photograph about the "Rolleiflex SL 2000F"
and the modular system parts, each page has explanations about the camera
development.
The Rolleiflex SL 2000 has nothing or almost nothing from ZI/Voigtländer,
most internal parts were from the SL35 E and SLX .
I also find very interesting to discuss these matters with you Marc.
Carlos
2014-03-05 4:05 GMT-03:00 Marc James Small <marcsmall@xxxxxxxxxxx>:
> Carlos
> Zeiss Ikon -- well, the Voigtländer engineers who had been taken over
> under the ZIV deal -- produced the metal shutter used in the prototype ZI
SL2000F.
> That shutter was fully developed by the time Rollei took over much of
> the old Voigtländer assets when Zeiss Ikon was pulled out of camera
production.
> Prochnow contended that this was a Rollei development but it was not,
> as Zeiss Ikon had developed it and passed it on to Rollei when they
> took over much of the Zeiss Ikon designs. Rollei picked up all rights
> to these cameras, incidentally, including patent and other
> intellectual property rights.
>
> Zeiss retained the Contares but this simply led to the Yashica Contax
> RTS, and Zeiss separately sold the SL725 to Wolf, who were never able
> to get it into publication.
>
> Thirty years back, I knew a number of the engineers who had worked on
> these shutters, some in person and others indirectly and a few by
> mail. Their stories are consistent: the electronic shutter was
> started when Voigtländer was still an independent asset owned by the
> Zeiss Foundation and then went over to be further developed after the
> merger which formed Zeiss Ikon Voigtländer, eventually leading to the
> one with metal curtains intended for the abortive ZI SL 2000F and which
was then, in turn, passed on to Rollei.
> F&H had a very long history with Voigtländer dating back to its first
> days and so the shutter in the Rolleiflex SL2000F and SL35E share a
> Rollei heritage.
>
> I recognize Prochnow's views on this, and, of course, nil nisi bonum
> mortuis. The truth is, though, that the facts speak contrary to his
views.
> You might want to join the Zeiss Ikon Collectors' Group on Yahoo!
> Lists and express his position there. Be prepared to meet some
> opposition, as some of our members on the ZICG also knew these self-same
engineers.
>
> Carlos, it is always a delight to discuss matters such as this with you.
> You hold your ground well.
>
>
> Marc
>
>
>
> msmall@xxxxxxxxxxxx
> Cha robh bàs fir gun ghràs fir!
>
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