[rollei_list] Re: Bellows on 2.8D?...an answer from Mr Prochnow
- From: Carlos Manuel Freaza <cmfreaza@xxxxxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Sat, 20 Aug 2005 23:56:46 +0000 (GMT)
I think he understood the question Patric, he answered
that the ring in the back of the lens is like a
diaphragm to save quality in difficult situations;
difficult situations are a strong backlight photo, a
photo where the sun appears directly, some other
strong light source, the diaphragm could help to save
image quality, that is its function, a light trap.
The second part could need more explanation. I
commented him in the last part of my question that I
had not seen the diaphragm in the Rolleicord IV (I'll
look again tonight), and then he answers that the
diaphragm can look different for every calculation, I
think he meant that the diaphragm is calculated
different for different models and then they look
different. In fact my Rolleiflex 2.8C 2.8/80 Xenotar
and my Rolleicord IV 3.5/75 Xenar look very different
in the taking lens back and both are like new in this
part.-
All the best
Carlos
--- J Patric Dahlén <jenspatricdahlen@xxxxxxxxxxx>
escribió:
> I don't think he understood the question?
>
> /Patric
>
>
> >From: Carlos Manuel Freaza <cmfreaza@xxxxxxxxxxxx>
> >Since I couldn't find an explanation on the topic
> in
> >Prochnow's Rollei books I decided to ask him
> directly
> >to complement the excellent info that Todd gave us
> >from his experience. While I was writing my
> previous
> >post I received Mr Prochnow's answer (My question
> to
> >him is bellow):
> >
> >"Dear Carlos.
> >
> >??The ring in the back of the lens is like a
> diaphragm
> >to save quality in
> >difficult situations.
> >It can look different on every calculation??
> >
> >Kind regards
> >
> >Claus"
> >
> >
> >
> > > Dear Claus:
> > > ??Finally a technical question, I'd like know
> the
> >exact
> > > task for the fabric (or similar) that you can
> see
> > > around the back of the taking lens in the
> Rolleiflex
> > > cameras like the 2.8C, D, E, 3.5 and a different
> > > fabric for the F, it seems a bellow or a seal or
> a
> > > trap light or a membrane, what is it?, what it
> does?
> > > what could happen if the "fabric" lacks?. I
> haven't
> > > see it in the Rolleicord IV?
> > >
> > > Best regards
> > > Carlos
> >
> >
> >
> >
> >
> >
> >
> >
>
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