Improving upon one of the most celebrated lenses in the canon ef line is no easy feat but canon has done just that the all new ef 70 200mm f28l is ii usm increases the speed performance and optical quality of the ef 70 200 f28l is usm while maintaining all of the characteristics that have made it a legend for professionals and advanced amateurs alike the ef 70 200mm f28l is ii usm features one fluorite and five ud elements for increased optical quality and reduced chromatic aberration