vertical frame spoilage

[siteseer <siteseer@xxxxxxxxxxxxxx>]

        I'm having a problem with vertical streaks appearing in many frames
of the Kodak HIE film that I shoot.  I have a .jpg of the contact sheet at

http://www.jorsm.com/~siteseer/contact.jpg

so you can see exactly what I am talking about.  The streaks appear to have
the same jagged silhouette pattern, but appear in different places in the
frame, like 1/3 from right, 1/5 from right, and near the right edge.

        I was wondering if anyone else saw the same results in their
shooting, and if so, what they did to correct the problem.

        I use a Nikon N2000, manual focus only, have black electrical tape
on the small window on the back of the camera that shows what kind of film
is loaded, so no light is leaking there, plus tape around the edges of the
back.  I loaded and unloaded the film in a totally dark room in a Rokunar
changing bag, and only took the film out of the plastic can while in the
bag.  The film was kept frozen until shot, and the shooting time was around
1 1/2 hours, with additional travel time of 2 hours before the film was
refrozen.  My shutter is a vertical shutter (the leaf goes up and down),
meaning if the problem was a shutter hang-up, the streak should be
horizontal instead of vertical.  The edge of the can should not be a
problem, since it never sees light due to the way I keep the film in total
darkness when loading and unloading.  I was thinking it might be a lens
diffraction, but the streak looks the same in the vertical pictures as in
the horizontal ones.

        All shots were at 1/125, bracketed at f8, f11, f16, except the one
series of four, which started at f5.6.

        I hope that's enough information to go on.



					http://www.jorsm.com/~siteseer

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