The Sony 70-200mm f/2.8G SSM A Mount Lens sports three focus hold buttons for superior control, plus an electronic slider focus range selector switch. The internal focusing system allows for the length of the lens to not change so that balance is kept and focusing is faster and easier. The Super Sonic Wave Motor produces smooth, silent autofocusing that has a rapid response time. Please note that there is a newer version of this lens that can be rented here. This lens is well suited for portraits, sports, and wildlife photography.