On 3/16/2018 12:34 PM, Savageduck wrote:

snip


The important thing to remember when it comes to IS/OS/VR is that it is there
to provide a fix for camera shake, not subject movement, and once you have a
shutter speed over 1/500 sec IS/OS/VR is irrelevant as the high shutter speed
should freeze all subject movement. Since you shot those ducks at 1/2000 you
could probably have managed without IS.

I usually turn off IR for any critter tracking, as it slows down the
tracking a tad. The shutter speed stability depends on the user's
individual hand stability, speed of the critter, and the focal length of
the lens.


--
PeterN