Gary,
I think your eyes deserve a rest after all this testing - especially given
the subject matter.
> I've posted four new lens tests at:
> http://members.aol.com/olympusom/lenstests/default.htm
>
> These include:
> 1. 200mm f/4 MC Zuiko
> a. with Joel Wilcox's overhauled OM-1, mirror lock up
> and the Bogen
> Telephoto Lens Support
> b. with Joel's Wilcox's overhauled OM-1 and just mirror lock up.
> 2. 135mm f/4.5 MC Zuiko Macro w/ OM-4, mirror and auto
> diaphram prefire and
> Bogen T.L.S.
> 3. 65-200mm f/4 MC Zuiko w/ OM-4, mirror and auto diaphram
> prefire and Bogen
> T.L.S.
>
> Note that it probably takes the utmost in lens and camera
> stabilizing to get
> good results out of the 200mm f/4. The hunch that a shutter
> overhaul in an
> OM-1 can result in less vibration probably doesn't hold true.
> A vertical
> shake in the left part of the slide at f/5.6 (1/60th sec.)
> and f/8 (1/30th
> sec.), on Joel's overhauled OM-1 (original model), is likely
> due to residual
> vibration from the auto diaphram mechanism.
>
> A Bogen Telephoto Lens Support, plus an OM-4 with mirror and
> auto diaphram
> prefire, appears to be able to coax out a performance
> increase in a 135mm
> f/4.5 Zuiko Macro, although a lens overhaul or light fungus
> removal might
> also have contributed. Same is true of a 65-200mm f/4 Zuiko
> at 200mm,
> although it didn't have fungus before an overhaul.
>
> From a statistical perspective, there are too many variables
> confounding this
> data to be able to make definitive statements. Not the least
> of which are my
> eyes. I can't make 3 or 4 way comparisons of tests shots
> (like the 200mm f/4
> tests). So, I offer these tests strictly as food for
> thought. From a
> practical point of view, employ all the vibration reductions
> techniques at
> your disposal, given the nature of the shot and the amount of
> time available
> to shoot it. Then pray (or forget the problems). :-)
>
> Gary Reese
> Las Vegas, NV
>
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