The Canon 70-200mm f/2.8L IS II offers extremely sharp image quality, and is ideal for shooting sports and for close-up work. The Canon 70-200mm f/2.8L IS III is its newer, current-gen version. Key features include: Improved four-stop image stabilization system Increased optical quality 3.9-foot minimum focusing distance at all zoom settings L-series build quality Advanced Optical Design. The Canon 70-200mm f/2.8L IS II USM features one fluorite element and five UD elements for increased optical quality and reduced chromatic aberration. It has a minimum focusing distance of 3.9 feet at all zoom settings, which is quite nice for those who use this for closeup work. Improved Image Stabilization. It also has an improved four-stop image stabilization system, compared to the original version’s two stops.description