[rollei_list] Re: Bellows on 2.8D?...an answer from Mr Prochnow
- From: Carlos Manuel Freaza <cmfreaza@xxxxxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Sun, 21 Aug 2005 13:50:57 +0000 (GMT)
Yes Todd, I could see the reddish felt ring last night
focusing the R'cord IV at 0.80m. The topic is as clear
as day for me now.
I liked the word "contraption", perhaps it's the best
word to define the thing that works at the taking lens
back for several models.-
All the best
Carlos
--- Todd Belcher <todd_belcher@xxxxxxxxx> escribió:
> All postwar Rolleicords have the felt ring I spoke
> of. No Rolleicords
> that I know of had the rubberized contraption at the
> back of the lens.
>
> todd
>
>
> On 20-Aug-05, at 8:26 PM, Richard Knoppow wrote:
>
> >
> > ----- Original Message ----- From: "Carlos Manuel
> Freaza"
> > <cmfreaza@xxxxxxxxxxxx>
> > To: <rollei_list@xxxxxxxxxxxxx>
> > Sent: Saturday, August 20, 2005 7:25 PM
> > Subject: [rollei_list] Re: Bellows on 2.8D?...an
> answer from Mr
> > Prochnow
> >
> >
> >> Yes Richard, I have seen again the Rolleicord IV
> and
> >> really it has a membrane or diaphragm that
> appears
> >> when you put the focus mechanism at the minimum
> >> focusing distance, it has a reddish color and
> it's
> >> very different regarding the system for the 2.8C,
> >> while the 2.8C is similar to your 2.8E, (it moves
> >> following the lens movement as Todd explained),
> the
> >> Rolleicord IV membrane or diaphragm(there are no
> >> "bellows" here) is invisible till you advance
> the
> >> lens to the minimum focusing distance (0.80m),
> that
> >> was the reason I did not see it before. As
> Prochnow
> >> wrote, the diaphragm, (or short "bellows" or
> membrane
> >> or whatever) looks different according each
> >> "calculation".
> >> The Rollei TLR cameras anti-reflection system are
> very
> >> effective according my experience; of course, as
> you
> >> wrote, it is not perfect if you shoot into the
> sun,
> >> but for this case it sometimes helps to obtain a
> bit
> >> of flare control enough for some detail in the
> photo.
> >> Perhaps that issue about the roller reflection
> seen in
> >> some cameras has something to do with problems
> for
> >> this "diaphragm".-
> >>
> >> All the best
> >> Carlos
> >>
> > The thing in the Rolleicord appears to be a felt
> bushing. I think a
> > similar arrangement is used in MX and earlier
> Rolleiflexes. I've had
> > my Old Standard apart completely. It uses a
> different arrangement for
> > focusing than later Rolleis but shares a very
> similar sort of light
> > trap. The lens has tube around it. This tube goes
> through a felt
> > bushing which is fastened to a hole in the body of
> the camera. On the
> > 2.8E this appears to have been replaced with a
> cloth ring which is
> > cemented to something at the rear of the shutter
> and to the clearance
> > hole in the body of the camera.
> > The cloth ring is made to have a single annular
> fold to allow focusing
> > movement.
> >
> > ---
> > Richard Knoppow
> > Los Angeles, CA, USA
> > dickburk@xxxxxxxxxxxxx
> > ---
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