This lens covers the ultra telephoto range up to 800 mm by continuously varying the angle of view from 82 to 31 the lens takes a lot of the footwork out of picture composition this digitally optimised lens covers the ultra telephoto range up to 800mm and has a fast maximum aperture its new lens coating reduces flare and ghost which is a common problem with digital cameras it incorporates two eld extraordinary low dispersion glass elements for effective compensation of chromatic aberr