[rollei_list] Re: xenotar 2.8f vs planar 2.8f, an answer from Prochnow
- From: Carlos Manuel Freaza <cmfreaza@xxxxxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Fri, 12 May 2006 17:57:00 +0000 (GMT)
Peter, this topic is dead, if not I could ask you
about the 16x16 enlargement what Xenotar and what
Planar mounted on what camera? 3.5 or 2.8, five or six
elements?, what film? what developer, what time used
to develop film and paper, what paper?, how were the
lens compared?, what enlarger and what lens for the
enlarger? how old were the lenses? etc., etc.
All the best
Carlos
--- "Peter K." <peterk727@xxxxxxxxx> escribió:
> Did you expect him to sya otherwise? There are and
> "practical differences."
> The only very slight difference is that the Planar
> is slightly better in the
> corners wide open. And even that is not noticeable
> until you enlarge it to
> at least a 16x16 print and really look at every
> detail.
>
>
> On 5/11/06, Carlos Manuel Freaza
> <cmfreaza@xxxxxxxxxxxx> wrote:
> >
> > I asked to Herr Claus Prochnow about this issue
> some
> > months ago and he answered me that there are no
> > practical differences between the Xenotar and
> Planar
> > lenses used for the Rolleiflex cameras regarding
> > quality. The tolerance Rollei factory required
> from
> > Zeiss and Schneider were the same and Rollei
> tested
> > the lenses in the same Zeiss K-6 tester machine,
> > sometimes some lenses were closer to the tolerance
> > limits than others, but it was applied for
> Schneider
> > and Zeiss lenses, it means it could be very slight
> > differences regarding individual lenses Xenotar
> and
> > Planar; however most lenses Planar and Xenotar are
> > made on the Rollei tolerance limits, Zeiss and
> > Schneider used these tolerance limits all the
> time.-
> >
> > All the best
> > Carlos
> >
> >
> >
> >
>
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>
> --
> Peter K
> Ó¿Õ¬
>
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