Re: Seitz Roundshot 220VR lenses

[Glenn Barry <bonza1@xxxxxxxxxxxxxx>]

Try this site for exact measurements of lens focal lengths, it may be of
some help

http://www.photodo.com/lens/

Glenn

Michael Stoll wrote:
> 
> >Once again I am trying to match a new lens to my Seitz Roundshot 220VR camera.
> 
> ...maybe we could set up a page with all ever measuered lenses ...
> 
> >The manual descibes a " shoot some film and judge with your eyes" procedure
> >to find the "exact" focal length.
> >
> >There is also a "distance to mainplane h value" for each lens when entering
> >information into the camera's controller.
> >
> >Can someone explain what this "h" value is and how it is calculated for a
> >lens that is not in the manual's lens list???
> 
> Seitz offers to measure a certain lens for you. Just call them.
> 
> >Also is it practical to use zoom lenses?
> >I'm trying a Nikkor 20-35 AF-D lens with the barrel taped down on the 24mm
> >mark.
> 
> ... Mr. Seitz told me, not to use such lenses, because of two reasons:
> 
> 1) you are never really aware of the focal length, even not with
> fix-focus-lenses,
>    as you can easily see from list at the manual's back. I. e. my
> 50mmNikkor (1.8)
>    has to be set up as 52.1 or something like this ...
> 
> 2) when spinning very fast, the leens could change its focal length by ...
>     (... gosh, have to consult my dictionary...) centrifugal power (...ups,
> could have
>     have known that ...).
> 
> >This lens covers the full height of the film at 24mm, but not at 20 mm.
> 
> I am fighting with the same problem @ 14mm-Sigma. There are several
> solutions: the best I've seen is @ Gene Woolridge's 220VR. He is using
> a modification, made by Hulcher (http://www.hulchercamera.com/).
> It allows to use Mamiya-medformat-lenses and even shift it (not suitable for
> QTVR but nice when shooting in gardens with high trees ;-)).
> 
> Gene is monitoring this list, too.
> 
> But one questions seems not solved to me until now: Do I get a larger
> vertical field
> of view with the hulcher-modification and the shortest available mamiya-lens,
> than when using the shortest 35mm-lens that covers the full height?
> 
> Anyone any ideas or even better: proofs?
> 
> >Is anyone using a fixed Nikkor 24mm and does it cover the full height of
> >the film?
> 
> I am using a 28mm-Sigma and its not as sharp as my 50mm-Nikon which I
> really love!
> 
> Cheers, Michael.
> 
> _______________________________________________________
> 
> ...hase...auto...adda... (Paul Anton Stoll, * 10.01.98)
> _______________________________________________________
> Werder & Stoll. Buero fuer Gestaltung
> Claudia Werder, Designerin MA (RCA)
> Heinz Michael Stoll, Diplom-Designer (FH), AGD, SND
> 
> Ebertstrasse 8
> D-72072 Tuebingen/Germany
> 
> phone           ++49 (0) 7071 / 360303
> fax             ++49 (0) 7071 / 360325
> E-Mail          mstoll@xxxxxxxxxxxxxxx
> WWW (docu-site) http://www.cityinfonetz.de/stoll/
> WWW (QTVR-site) http://www.cityinfonetz.de/stoll/
> ICQ#            17446938   (see: www.mirabilis.com)
> _______________________________________________________

-- 
Glenn Barry Photography
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2007 Australia
Ph/Fax (612) 9211 3080
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