Moose has already answered this well, but thought that I might add
something. If you study the lens tests on Gary Reese' site for this
lens you will see that the best results were obtained with a tripod
attachment made by Bogen which supports the lens which does not have a
tripod ring, and an OM4 with self timer which allows prefire of both
the aperture and the mirror. The mirror lock up on the OM1N helps, but
a lot of vibration is also generated by the way the aperture is
actuated. And the weight of the 200/4 hanging on the front of the
supported camera just seems to magnify it. There is no way to eliminate
that aperture vibration although an auxiliary lens support would
probably be helpful and Moose's instruction on dampening the vibration
by holding which comes from Olympus. The other thing you might try is
to get the shutter speed out of the sensitive range from 1/2 second to
1/60 second by adjusting the aperture. If you can get the shutter speed
long enough so that the vibration die down is a small percentage of the
total time you can get a sharp picture. Faster film.
Winsor
Long Beach, California
USA
On Sep 4, 2004, at 1:29 PM, Simon Worby wrote:
>
> I've just had some photos back taken with my new-old 200mm f4 Zuiko. I
> have two shots of the same thing, one fast speed, low DoF (probably
> f4), and one low speed, high DoF (probably f22). The latter is blurred
> -- like camera shake, but I know for sure I took it on a tripod with
> cable release. IIRC speed was around 1/4 second. All the small
> aperture shots taken with this camera/lens combination (OM-1N & 200
> f4) are blurred; all were taken using cable release and tripod. Small
> aperture shots taken with my 35-105 lens seem fine (same camera).
>
> Is it possible to have a lens that is "broken" at small apertures?
> Would the sympoms be consistent with mine? Is there any further way of
> telling / conclusive tests I can run?
>
> Thanks in advance...
>
> Simon Worby
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