Improving upon one of the most celebrated lenses in the Canon EF line is no easy feat but Canon has done just that. The EF 70-200mm f/2.8L IS II USM increases 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. The EF 70-200mm f/2.8L IS II USM features one fluorite and five UD elements for increased optical quality and reduced chromatic aberration. It has a minimum focusing distance of 1.2m/3.9 ft. at all zoom settings which is useful for photographers in smaller spaces trying to get closer to a subject. It features a next-generation Optical Image Stabilizer providing up to 4 stops of correction at all focal lengths. And as with all L-series lenses the EF 70-200mm f/2.8L IS II USM is dust and moisture-resistant and designed for use in the challenging environments typical of rigorous professional use. ? Key Features: Redesigned High-Performance Optical System The EF 70-200mm f/2.8L IS II USM features a re-designed optical system consisting of 23 elements in 19 groups to deliver truly impressive results. A high-performance fluorite element is used at the heart of the lens path coupled with no fewer than five ultra-low dispersion (UD) elements drastically reducing chromatic aberration throughout the zoom range to produce high contrast images with edge-to-edge definition. High-Speed AF A high-speed Auto Focus (AF) system perfectly matches the abilities of the recently-launched EOS-1D Mark IV and EOS 7D Digital SLR (DSLR) cameras. The new model also features a ring-type USM AF motor which combines with a new high-speed CPU and an optimized AF algorithm to make auto focusing both faster and quieter. Minimum Focusing Distance of 3.9 Feet A reduced minimum focusing distance of 1.2 meters (3.9 ft) and improved 0.21x magnification will allow photographers to get closer to subjects without needing to swap lenses &ndash