Optical Image Stabilization, or OIS, is a hardware technology that reduces blurry photos and shaky videos caused by hand movement. Inside the camera, gyroscopic sensors detect even the slightest vibrations. Based on their data, miniature motors then real-time shift an element of the optical system—most often the lens or directly the image sensor—in the opposite direction of the movement. In this way, the image is "stabilized" before it even reaches the sensor, allowing for sharp shots even with longer shutter speeds, i.e., the time during which the sensor collects light. This is particularly advantageous in low-light conditions. Unlike Electronic Image Stabilization (EIS), which stabilizes the image digitally by cropping it after capture, OIS does not lead to a reduction in quality or a decrease in the field of view.
