In general, lens-based optical image stabilization is built into the lens, but whether it works fully depends on body compatibility. On Micro Four Thirds, Panasonic lenses usually communicate best with Panasonic bodies, and some stabilization features may be limited or unavailable on non-Panasonic bodies. If your non-Panasonic body supports the lens’s OIS control, the lens stabilization may still work, but you typically should not expect Panasonic-specific coordinated stabilization features unless both lens and body support them together. Also, if your camera has in-body image stabilization, you may need to choose between body IS and lens OIS depending on the camera’s menu options and compatibility. The practical answer: basic OIS may work on some non-Panasonic bodies, but full intended stabilization support is most reliable on Panasonic bodies.