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  • An lens-based optical image stabilizer, often abbreviated OIS, IS, or OS, is a mechanism used in a still camera or video camera that stabilizes the recorded image by varying the optical path to the sensor. This technology is implemented in the lens itself, or by moving the sensor as the final element in the optical path. The key element of all optical stabilization systems is that they stabilize the image projected on the sensor before the sensor converts the image into digital information. Different companies have different names for the OIS technology; for example: Image Stabilization (IS - Canon, the first to produce an OIS lens), Vibration Reduction (VR - Nikon), Optical SteadyShot (Sony Cyber-Shot), MegaOIS (Panasonic and Leica), Super Steady Shot (SSS - Sony), Optical Stabilization (OS - Sigma), Vibration Compensation (VC - Tamron) and Shake Reduction (SR - Pentax).