Built with optical design that offers a large maximum aperture, and a linear motor that delivers high-speed AF performance, while featuring the image stabilization function that allows the use of shutter speeds 4.5 stops slower. This is a lens you can trust even in toughest of the shooting conditions. Using high-performance glass lens elements throughout. Containing two ED lens elements, including one Super ED lens element that boasts performance equivalent to that of fluorite lens, to control chromatic aberration, which typically occurs in long focal lengths. Sharp and crisp image description across its entire zoom range.