On Wed, Oct 12, 2011 at 7:48 PM, Chris Trask <christrask@xxxxxxxxxxxxx>wrote:
> >
> > Hi Chris,
> >
> > I had been very happy with a lightweight Gitzo CF tripod for several
> years.
> > I mounted a Zuiko 1000mm on it in a windy location. The image bounced
> around
> > so much it was difficult to frame the scene without holding the camera
> still
> > with my hand. The same tripod had previously routinely given excellent
> > results with a 400/4 Tamron + 1.4x teleconverter. I've never understood
> why
> > the results were so very dramatically different.
> >
> > Recently I mounted a 500/4 cat lens on my new heavier CF tripod. With 10x
> > live view I again saw more movement than I am willing to accept. I think
> the
> > problem this time was the geared head I was using. I'm going to try again
> > with the Acratech ball head I've been very happy with.
> >
> > Your mention of the braces between the legs gives me something to think
> > about. The main thing I started wondering about due to the article was
> that
> > a twin-shank leg(typical of a wood tripod) would be much more resistant
> to
> > twisting about the center axis of the tripod.
> >
>
> For long lenses I stick to those that have a tripod ring, such as the
> older Vivitar 400/5.6 TX and the 75-260mm TX zoom (both available as T4
> also). I do so in order to reduce stress on the camera body when using a
> tripod or pistol grip, and I suspect that having the camera/lens mounted
> near the centre of gravity would have some influence on the tendency
> towards
> wibration just as much as the construction and materials of the tripod.
> But, I'm only hazarding an educated guess here.
>
> Chris
>
With the Zuiko 1000 weighing 4kg and being 660mm long I shudder to think
what would happen if it were supported by the camera's lens mount. The 500/4
cat has a tripod mount foot but the foot is tiny. After switching heads I'll
look into the lens's foot.
Jeff
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