At lower speed your hand will introduce movement. The concept is your
tripod provide you low shutter speed stability but it is not so
effective in absorb the higher frequency vibration introduced by the
camera's mechanical movement, your body absorb that higher frequency
vibration but it could introduce movement at slow speed. Seems you
can't catch it, anyway just try it yourself, I have tried that with my
85-250 few months ago with the Gitzo 1228MK2. The conclusion is using
self timer for speed below 1/30s, with other speeds hold the camera
tight and use your finger to trigger the shutter.
C.H.Ling
Tris Schuler wrote:
>
> > That is absolutely true for shutter speed of 1/30s or over, but
> > for shutter
> > speed of 1/8s or below, it won't work.
> >
>
> That sounds more to me like at higher shutter speeds you won't
> notice the extra shake introduced by the hands, whereas at slower
> shutter speeds this extra shake will become critically apparent. In
> other words, if this theory has any validity it should work at all
> speeds. The fact is that it is at the lower shutter speeds camera
> shake has it greatest effect. Indeed, at much higher speeds a bit of
> shake won't be noticed at all, at least not in casual inspection (to
> the human eye). This is why it's quite possible to freeze the action
> at various shutter speeds (relative to focal length) during
> hand-held sessions.
>
> Tris
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