In article <777cc$11117.290@news.isdnet.com>, carlos@isdnet.com says...

>I made something that helps to seriously reduce the problem of mirror
>vibration. I took a lead bar (available at well-stocked gun stores for >making your own bullets) and drilled right into the middle of it. There
>I inserted a nut the same size as the tripod mount screw, which is held
>in place with epoxy (plus the hole was slightly small and I pounded the
>nut into place with a hammer). This screws onto the camera mount bolt
>at the bottom of my tripod. I get two benefits; great vibration damping
>and a much steadier tripod.

(Not to mention bigger tripod-carrying muscles....;-) This is a neat idea
that is adaptable for hand-holding - put a 1/4 - 20 bolt through the bar
and into the tripod socket on the bottom of the camera (a thin pad on
top the bar for protection, a large washer under the head of the bolt,
and care [so as not to extend the bolt too far into the tripod socket]
might be a good idea), and you wind up with a very heavy, but
easier-to-hand-hold-steady, camera.....
Hope This Helps