[rollei_list] Re: Rollei taking and ... Rolleikin parallax
- From: Carlos Manuel Freaza <cmfreaza@xxxxxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Thu, 21 Sep 2006 01:57:39 +0000 (GMT)
Talking about parallax, I think could be interesting
to comment about the parallax using the Rolleikin.
Since the camera parallax compensation mechanism is
useless for the 24x36mm format, the Rolleikin masks
have focusing frames less than 24x36mm, the focusing
screen mask frame measures 24x33mm and the
sportsfinder mask frame (more parallax) measures
27x21mm only;I never perceived parallax problems using
these masks.-
All the best
Carlos
--- Richard Knoppow <dickburk@xxxxxxxxxxxxx>
escribió:
>
> ----- Original Message -----
> From: "Eric Goldstein" <egoldste@xxxxxxxxx>
> To: <rollei_list@xxxxxxxxxxxxx>
> Sent: Wednesday, September 20, 2006 2:37 PM
> Subject: [rollei_list] Re: Rollei taking and viewing
> lens
> alignment
>
>
> > David Dodge wrote:
> >> I'm puzzled by all the ingenuity spent on
> parallax
> >> correction. It seems easy enough to just aim a
> bit high,
> >> 1-1/2 inches on my Yashica. .
> >>
> >> Most parallax correction contraptions are a bit
> of a
> >> makeshift.. Since the viewing lens is a bit
> higher it
> >> looks over things that might block the view of
> the taking
> >> lens. The Mamiya folks solve this with a device
> that fits
> >> between the camera and the tripod, that will jack
> the
> >> taking lens into the same place as the viewing
> lens. I
> >> have taken advantage of the bellows of a Mamiya
> to make
> >> 6x6 macro pictures by making pencil marks on the
> tripod.
> >> This wouldn't work if the camera had parallax
> control.
> >> David
> >
> >
> > It's more the difference in the position of
> objects
> > relative to each other (perspective) that is of
> more
> > concern shooting a TLR close in than the error in
> framing
> > (which is what the correction tries to compensate
> for).
> > The paramender device Mamaya produced that you
> describe
> > corrects for the perspective/parallax error. A.
> Adams was
> > bothered by this and avoided TLRs and rangefinders
> because
> > of it...
> >
> >
> > Eric Goldstein
>
> At the normal minimum distance of a Rolleiflex
> the error
> is tollerable but it becomes worse when using close
> up
> adaptor lenses. The parallax corrector is right for
> only one
> distance as you point out. The frame limits are
> correct for
> that distance but not for others and the relative
> positions
> of objects is not corrected.
> The use of a vertical slide will correct the
> problem
> with relative position but the parallax compensator
> will
> then make the frame limits of the finder wrong. I
> think this
> is the reason Rollei offered the sheet film and
> plate
> adaptor.
>
> ---
> Richard Knoppow
> Los Angeles, CA, USA
> dickburk@xxxxxxxxxxxxx
>
> ---
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