The newly designed M.Seiko digital ED 75-300mm II F4. 8-6. 7 with a 35 mm equivalent of 150-600mm is an affordable super telephoto lens that delivers excellent portability and outstanding image quality when paired with the award-winning Olympus pen or om cameras. Weighing only 14. 9 ounces and measuring 2. 7 by 4. 58 inches and reaching 300mm, This is the perfect lens to take with you for capturing outdoor nature scenes. Comprised of 18 elements in 13 groups, including a super ED lens provides exception optical performance throughout the zoom range. One super ED (extra-low dispersion) lens and 2 Ed lenses eliminate chromatic aberration which deteriorates a picture. 3 hr. (High refractive index) lenses make the lens compact and provide an excellent picture throughout the zoom range.