By all appearances it looks like the light _is_ coming from in front, but
having diagnosed many such problems, one learns to check everything!
One method is to align the negative as it was when the photo was taken -- dull
side toward the film rails, top side down. Then open the shutter on "B" with
the offending lens attached, set wide open, and look at the negative. Point
the lens toward a light source and see if you can observe the source of the
reflection. Wave it all around, at arms length and then with your eye up close
-- try every angle and position you can think of. Any un-painted
portion of the rear end of the lens may be the problem, or there may be
something shiny inside the mirror box somewhere.
A new problem we've seen a couple of times with OM-4/4t's occurs when the
sub-mirror doesn't rise fully when the mirror goes up. When that happens,
light can be reflected onto the film in strange ways -- including light coming
in through the eyepiece! So while you have the camera back open and the
shutter open on "B", check to make sure that the sub-mirror is held firmly to
the top of the mirror box, against the back side of the mirror. If not,
something's wrong!
Bachofen wrote:
> Howdy all,
> Thanks for the help on my lens. It's not the camera body(s). I'm am
> 99ure that it's happened on more than one body, and I think on all three.
> Mostly, my 85 is mounted on my 4T. Never have any other lenses exhibited
> such behavior. I'm posting two more example for your analysis. I believe
> this problem to be only lens related.
> http://pwp.clearsource.net/mbachofen/images/photographs/85mm
> 0.000000lare.jpg
> Not particularly good pictures, but good examples of this problem. I have
> the proper lens hood for the 85mm and was using it on both these shots.
> Matthew Bachofen
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