>
> >>My own guess is this. When the tripod/head is rigid and there is little
or
> no vibration, IS does disengage. When you loosen the head -- as for
> following birds in flight -- the gyros sense some vibration and the IS
> begins to operate again.<<
>
> A. When the lens is mounted on a steady tripod and the shutter button is
> pressed halfway, the IS begins to operate immediately and the image in
> the
> viewfinder goes through a very slow vertical shift for about 1 second.
> After
> that, if the shutter button continues to be pressed halfway, the IS
> mechanism automatically goes into a special mode which is designed to
> detect
> and correct for mirror slap and shutter movement
> at slow shutter speeds.
I wonder if this can be further "proven" by some who has one of these
super-tele lenses to listen for the IS sound, both of my "lesser" IS lenses
can be heard while IS is in operation.
Regards,
Ken
*
****
*******
***********************************************************
* For list instructions, including unsubscribe, see:
* http://www.a1.nl/phomepag/markerink/eos_list.htm
***********************************************************
