On Dec 14, 10:08 pm, fotor...@[EMAIL PROTECTED]
(Ralf R. Radermacher) wrote:
> RolandRB <rolandbe...@[EMAIL PROTECTED]
> wrote:
> > Do the wider-angle lenses that can go with the Panoraflex camera, such
> > as the 75mm and 90mm lenses, need a center filter to reduce vignetting
> > or do modern lenses not need it?
>
> Panoraflex... aha. Bought one of those from this chap when they still
> carried the original Gaoersi label.
Is the Panoraflex 617 exactly the same camera as the equivalent one
that can be linked to from the following page?
http://www.gaoersi-camera.com/main.php
> I use it with a Nikkor 8/90 mm for 6x17 cm and this works fine without a
> center filter if the lens is stopped down to f22 at least. The same
> should hold true with the 75 mm lens and 6 x 12 cm (75 mm with 6 x 17 is
> too extreme in my opinion).
>
> Use a center filter and you may open up the lens by a stop or two and at
> the same time you'll have to multiply your exposure time by the filter
> factor, so you'll end up with the same times as without.
>
> > Is the 2cm shift enough for architectural work when using the 75mm and
> > 90mm lenses?
>
> There's no easy answer to that question. Depends on what you want to
> photograph from what distance.
>
> > Not sure if this should go in the large format category. Can 120 or
> > 220 film use be "large format"?
>
> Most large format forums accept people doing 6 x 17 on rollfilm in their
> discussions so I guess it would qualify as LF. You could always say
> you're doing 2 by 7 inch format. :-)
>
> Ralf
>
> --
> Ralf R. Radermacher - DL9KCG - K=F6ln/Cologne, Germany
> private homepage:http://www.fotoralf.de
> manual cameras and photo galleries - updated Jan. 10, 2005
> Contarex - Kiev 60 - Horizon 202 - P6 mount lenses
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