The Fujinon TS-21A is an optical stabilizer for Fujinon telephoto lenses. When used, the TS-21A will provide glass-smooth images even at extreme telephoto, most commonly used during sports broadcasting. Often when lenses increase magnification, they become increasingly difficult to keep steady. The TS-21A virtually eliminates this problem.
The element inside the stabilizer compensates for these slight but noticeable vibrations, whether it is from wind, or unsteady support platforms. The special "sandwich" design allows it to easily be fit between the camera and lens, making it very simple to take on and off.