Just trying to help. Let me know when you decide what is causing the
shadow.....;-)
John
Winsor Crosby wrote:
> >At 10:55 AM 4/25/1998 -0700, you wrote:
> >>>At 11:00 AM 4/25/1998 -0400, John wrote:
> >>>>That is the shape the curtain string makes when it slackens up and
> >>>>hangs into
> >>>>the frame during exposure.
> >>>>
> >>>>John
> >>>>Camtech
> >>>>
> >>>
> >>>I think we just had a round of discussion about this recently, but darned
> >>>if
> >>>I saved anything about it. This happens to me once or twice about every
> >>>third roll. Is it largely an intermittent problem?
> >>>
> >>>Is there a home fix?
> >>>
> >>>Joel
> >>>
> >>Have you looked to see whether that is it?
> >>
> >>Winsor Crosby
> >>Long Beach, California
> >>mailto:wincros@xxxxxxxxxxx
> >>
> >Winsor,
> >
> >If I understand your question, I've locked up the mirror and looked around
> >the mirror box. Nothing. I've set the shutter on bulb and fired a few
> >rounds looking for hanging debris. Again nothing.
> >
> >Since I believe it only happens with one of my lenses, I am now suspicious
> >that I'm getting some sort of ghost image or flare off a fungus-scarred
> >portion of the rear lens element. Trouble is, I'm not learned enough to
> >know whether this is possible.
> >
> >Thanks for asking. Any ideas?
> >
> >Joel
>
> It certainly looks like a shadow, not flare which is light being reflected
> about. I was ready to go with John, but since the image is reversed at the
> film plane, I think that the shadow of a hanging string would be hanging up
> from the bottom edge of the picture.
>
> It seems to me that if it were something with the lens the shadow would
> focus in the viewfinder as well as at the film plane. Can you see it in the
> viewfinder? If you can, why don't you try unlatching the suspect lens and
> rotating the whole lens as if you were taking it off, but looking through
> the viewfinder all the while. If the shadow rotates with the lens barrel it
> would seem to be an artifact of the lens.
>
> If you can not see it through the viewfinder I really think it is something
> between the mirror and the film plane. As an experiment I took a single
> strand of hair(from my head) and put it across the back a lens before
> bayonetting it on my OM1n to see whether I could see it in the viewfinder.
> My plan did not work because the strand moved inside the mirror box and
> even though I could see its shadow clearly in the viewfinder it took me a
> devil of a time to find the actual strand. Very difficult to see a single
> fine dark hair in a dark little box with lots of crannies. I would use good
> light, magnification, brush, compressed air to see what I could remove.
>
> Winsor Crosby
> Long Beach, California
> mailto:wincros@xxxxxxxxxxx
>
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