Skip wrote:
>
> "F. Craig Callahan" wrote:
> >
> > [EMAIL PROTECTED] wrote:
> >
> > > Arthur Morris . . . recommends pressing down on the
> > > lens directly over the tripod mount with your hand to dampen vibration and
> > > also not using a cable release, but, rather, using the camera against your
> > > cheek and pressing the shuitter manually as a point of stabilization.
> >
> > This is definitely one instance where your mileage will vary, and some individual
> > experimentation might be in order. Personally, I find that with sufficiently slow
> > shutter speeds and/or high magnification, any contact I have with the
> > camera-tripod assembly will cause unwanted movement or vibration. OTOH, there are
> > plenty of instances where your subject doesn't remain stationary long enough to
> > lock down everything, but even in these situations it is often possible to use a
> > remote release by holding it in one hand that is also doing something else (such
> > as holding the lens). This is a little technique I've used ever since I
> > discovered that simply pressing the shutter button can produce a small but
> > significant amount of camera movement (both vertical and rotational) when the
> > camera is on a tripod.
> >
> > fcc
> >
> I saw A. MOrris's post on this subject on another forum, and could
> barely restrain myself from answering. The only thing that did restrain
> me was an immediate inability to answer it civilly. With the long focal
> lengths and slow shutter speeds he cited, there was a strong probability
> that his heartbeat would introduce unwanted movement. the only saving
> grace is that this technique may, repeat MAY, reduce vibration of the
> wood deck, but I'm afraid it would introduce movement elsewhere. I
> looked at Mr. Morris's images on his website, at least his nature ones,
> and could find little evidence of stellar lens stability and sharpness
> of image. They were good, but not excellent, in the sharpness
> department, leading me to think he needs to reexamine his technique.
> Skip
Skip,
I agree with most of what you say but I do not think you can judge from
a 2 inch image on a monitor displaying a 72 ppi image at 72 dpi.
Personally, I use the 500 IS lens with IS turned "ON" 100% of the time
and do not have to worry about such issues. Before I bought the IS
version, I would hang a heavy camera bag or sit a heavy bean bag on top
of the lens as close as possible to the center of the tripod head being
careful now to hinder the AF ring movement. IS work's much better and
is much more convenient.
Ray Amos
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