Jeff,
I understood but I don't know why vignetting at right upper corner only.
According information from largeformatphotography.info, the max rise of 72XL
is 47.75mm
http://www.largeformatphotography.info/lenses/LF4x5in.html
My Ebony SW45 can be rised max 60mm, I'm not sure did I rise the front panel
near the limitation of 72XL caused vignetting?
Maybe I have make a mark at my camera to remind me the max rise for 72XL.
---
Michael
On 15 August 2010 15:14, Jeff Keller <om-list@xxxxxxxxxxx> wrote:
> Hi Michael,
>
> I don't know if you've come across this: many LF cameras have the corners
> of
> the focus screen clipped off so that when everything is set up including
> the
> aperture stopped down you can look through the corners to see if the
> aperture is round. If your focus screen has clipped corners you should be
> able to see any mechanical vignetting show up as a football shaped
> aperture.
>
> The Super Symmar XL's are thought to have the greatest light falloff but
> the
> IC on your 110 SS XL is so large you shouldn't have a problem with it. The
> 80mm SS XL had a recent discussion:
>
> http://www.largeformatphotography.info/forum/showthread.php?t=65234&highligh
> t=center+filter<http://www.largeformatphotography.info/forum/showthread.php?t=65234&highligh%0At=center+filter>
>
> The Schneider center filter for the 72mm XL has a 112mm front filter thread
> so that a second filter could be attached to it and not cause vignetting.
> The lens has a 95mm thread which they surely believe is fine for a single
> filter. The lens has a 226mm IC and would thus cover a 5x7 film with little
> room left for shift/tilt.
>
> The Super Angulon 90mm f8 has a IC of 216mm so it can handle about an inch
> of shift from center.
>
> http://www.schneideroptics.com/info/vintage_lens_data/large_format_lenses/su
> per-angulon/data/8-90mm.html<http://www.schneideroptics.com/info/vintage_lens_data/large_format_lenses/su%0Aper-angulon/data/8-90mm.html>
>
> The schneideroptics website has a lot of information but finding it seems
> to
> require a search engine.
>
> Best wishes,
> Jeff
>
> -----Original Message-----
> From: Michael Wong [mailto:mialop@xxxxxxxxxxxx]
> Sent: Saturday, August 14, 2010 7:46 PM
> To: Olympus Camera Discussion
> Subject: Re: [OM] Visited Macau
>
> I have same experience for my old Super Angulon 90mm F8, is the vignetting
> easy to perform for wide angle lens?
>
>
> Thanks, Jeff.
>
>
> ---
> Michael
>
>
>
> --
> _________________________________________________________________
> Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
> Archives: http://lists.thomasclausen.net/mailman/private/olympus/
> Themed Olympus Photo Exhibition: http://www.tope.nl/
>
>
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|