Image stabilization (IS) is a group of technologies that reduce the blurring caused by a camera’s movements. Also known as vibration reduction, Optical SteadyShot DSLR camera or MegaOIS, IS enables you to take sharp pictures at slower shutter speeds than are normally not possible.Types of Image Stabilization.There are two main types of image stabilization: lens-based IS and in-camera IS. Lens-based IS. This type of image stabilization involves the shifting of a lens element, by gyroscopically controlled electromagnets, in the opposite direction of the motion of the camera toward the optical axis along the camera’s horizontal and vertical plane .This in turn neutralizes any sign of camera shake. Generally, measurements are taken at about 4,000 times a minute to ensure seamless on-the-fly stabilization corrections, though this depends upon the type and model of the lens and the camera. One of the key advantages of lens-based IS is that it allows a much smoother performance when you use a longer focal length lens. In addition, it allows you to see the effectiveness via the camera’s viewfinder. However, this type of camera stabilization is often not available for all types of lenses and it also adds to the overall cost of the lenses. In-camera IS In-camera stabilizer works in the same way as the lens-based image stabilization but rather than a lens element, it is the imaging sensor of the camera that is shuttled about in the opposite direction of the movements of the camera so as to reduce effects of camera shake. In-camera IS enables you to enjoy the advantages of Image Stabilization technology with any type of lens that you can mount on your camera and for significantly less cost than the multiple IS-enabled optics. However, compared to the lens-based IS, this type of image Stabilization is not effective when it comes to smoothing the bumps that appear if you’re shooting with long focal length optics.