Unless of course it's weight is being taken by a monopod. Then all
your muscles have to do is to provide the residual balancing, aiming,
and steadying. The worst remaining source of shake with a heavy camera
on a monopod is twisting about the axis of the monopod, because that's
where there's least rotational inertia and least frictional resistance.
Some monopods offer tiny pull-out tripod feet at the end, or a small
flip-out foot plate to stand on, either of which does a good job of
reducing that horizontal rotational movement.
> Putting these two factors together, I would expect the mass-stability
> curve to start at some level (>0) for empty hands and increase slightly
> up to some maximum value (1-2 pounds) and then decrease rather more
> quickly to zero for weights that I cannot lift at all.
My camera with my usual walk-about zoom weighs roughly 2lbs. So does
my heaviest monopod (with little legs). I usually use that monopod
with the camera directly attached with no head, so for taking shots in
portrait mode I have to hold the monopod plus camera horizontally in
the air, which is pretty heavy. Nevertheless for short duration holds
I find the extra mass of the monopod helps to keep the camera quite
definitely steadier than if I was just holding the camera alone. I
also have a two handed grip with hands much further apart than
possible just on a camera body.
For which reasons I often use the camera with the monopod attached but
folded up and not resting on anything. The extra mass and well spaced
double handed grip gives useful extra stability.
No, I'm not big & strong. I'm 70 years old and weigh about 120
pounds. But I do practice heavy camera carrying on a regular basis :-)
> The full analysis is certainly somewshat more complicated and involves
> more factors.
To the extent that, much as I enjoy that kind of mathematical
modelling, I think the best approach is to postpone the analysis and
go out & try stuff. Doing the analyis after the field experiments
instead of before is always a good idea :-)
--
Chris Malcolm