Do Panoraflex lenses need a center filter?

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RolandRB - 14 Dec 2007 14:33 GMT

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?

Is the 2cm shift enough for architectural work when using the 75mm and
90mm lenses?

Not sure if this should go in the large format category. Can 120 or
220 film use be "large format"?

http://www.panoraflex.de/index.php

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Ralf R. Radermacher - 14 Dec 2007 21:08 GMT

> 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.

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

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Ralf R. Radermacher - DL9KCG - Köln/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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RolandRB - 15 Dec 2007 08:44 GMT

> > 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
[quoted text clipped - 25 lines]
> manual cameras and photo galleries - updated Jan. 10, 2005
> Contarex - Kiev 60 - Horizon 202 - P6 mount lenses

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Ralf R. Radermacher - 15 Dec 2007 09:58 GMT

> 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 suppose so.

Oh, and one more remark on the topic of the 2 cm shift: I have the
earlier non-shift version and while I have no idea if 2 cm is enough for
your kind photography or not, it would certainly be nice to be able to
move the horizon out of the dead centre of the frame by those 2 cm
(about a third of the frame height, after all) without getting
converging verticals.

Ralf

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RolandRB - 15 Dec 2007 11:00 GMT

> > Is the Panoraflex 617 exactly the same camera as the equivalent one
> > that can be linked to from the following page?
[quoted text clipped - 9 lines]
> (about a third of the frame height, after all) without getting
> converging verticals.

Most definitely. I wouldn't want the camera unless it had shift.

With 90mm lenses, isn't the image circle wide enough to not need a
centre filter?

> Ralf
>
[quoted text clipped - 3 lines]
> manual cameras and photo galleries - updated Jan. 10, 2005
> Contarex - Kiev 60 - Horizon 202 - P6 mount lenses

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