Originally posted by reh321 I had thought that in-lens stabilization was done wih gyros - is Pentax's IBIS also affected in the same way? So far, the stability I learned to provide 50 years ago hand-holding a camera continues, so this is a theoretical thing for me. but I know my body will fail me someday .......
I think the earliest ones did but every more recent in-lens stabilizer I've ever dug into uses gyro sensors, a computer, and electromagnets to shift a lens group in X & Y.
And, yes, Pentax IBIS is affected by this, too. It's caused by living on a silly spinning planet.
If you could handhold a 100mm lens shot for more than 1.5 seconds, you too would suffer from this. Your ear's semi-circular canals would feel the spin of the Earth and make you think you need to adjust the camera's pointing direction by 15° per hour.
Personally, I love image stabilization for shooting in dark places (e.g., cathedrals & museums) where tripods and flash are usually forbidden. And it comes in handy at dawn, dusk, and night. It's great for full-moon night hikes.