Chip writes:
> By placing the point of fixation a distance from the center of gravity
> (balance point), you increase the 'polar moment of inertia' of the
> lens/camera combination.
>
> When you increase the polar moment of inertia, you will lower the resonant
> frequency of the lens/camera system on the tripod mount, and hopefully
> reduce the transmission of the higher frequency vibrations of a
> mirror/shutter/aperture firing to image degrading lens movement.
Thanks Chip. Let it be known that I had no idea why. George Anderson told
me to do it. :-) Just one of those things we never would have known if it
wasn't for this community.
Gary Reese
Las Vegas, NV
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