Optimized for speed, this lens is equipped with a fast and constant f/2.8 aperture that will be an asset in low-light conditions as well as for creating images with shallow depth of field. Bokeh is made even better by the implementation of an eleven-blade circular diaphragm for smooth out-of-focus areas. Also, there is a double-linear and ring Super Sonic wave Motor system that provides fast, responsive autofocus in both stills and video.
As a top end telephoto zoom, this lens is equipped with a variety of other technologies to assist shooters, including Optical SteadyShot image stabilization for combating camera shake, especially at longer focal lengths. Users will enjoy faster and more intuitive operation with a plethora of physical controls on the lens barrel, including three focus hold buttons, a focus range limiter switch, and both AF/MF and OSS switches. For durability and working in tough conditions, the lens is dust and moisture resistant, and it has a fluorine coating on the front element to resist water and oil.