Canon EF 70-200mm f/2.8 L IS USM II is a portable, high performance telephoto zoom lens incorporating Canon’s 2nd generation Image Stabilization technology providing up to three stops of correction for camera shake. The 2nd generation lens technology maximizes the speed, performance and optical quality of the EF 70-200 f/2.8L IS USM while maintaining all of the characteristics that have made it a legend for professionals and advanced amateurs alike. Featureing one fluorite and five UD elements for increased optical quality and reduced chromatic aberration. The AF system has been refined for a beautiful bokeh affect. Improved optical formula produces superior image quality and its material is highly resistant to dust and moisture.