sentences:  The effectiveness of image stabilization systems varies somewhat from implementation to another, but there seems to be no inherent superiority to either lens-based or sensor-based systems  as far as the actual improvement in captured images.Modest image stabilization systems can degrade image quality if the photographer is intentionally panning (as the system tries to negate the panning motion), or if the camera is mounted on a very sturdy tripod (the system drifts around slowly due to spurious measurements over the course of a long exposure).Some more recent IS systems can automatically detect these situations and disable the IS along the panning axis, or disable it completely if the camera is on a tripod.