[mst]

Now, about gyros. What is more likely to break : nothing or a gyro ? ;-)

Sure... however, thinking back over the last 10 to 15 years or so, I remember only one IS/VR failure on one of the lenses I owned or handled. Several AF failures during the same period, though.

In other words: yes, ILIS adds to the complexity of a lens, but from my experience it isn't particularly prone to failure.

The potential decentering issue Klaus mentioned earlier remains of course.

As far as OVF go, IBIS won't obviously stabilize what you see in the VF... and in this specific case ILIS has a clear advantage.

That's how I meant it. Plus, on a DSLR, ILIS will help the AF do its job, too, especially with long focal lengths.

-- Markus