Sigma 70 200mm f28 ex dg os hsm produced in their legendary aizu facility in japan sigma presents their 70 200mm f28 ex dg os hsm telephoto zoom lens building on 50 years of innovation in precision optics design and craftsmanship the 70 200mm is a large aperture zoom lens optimised for mid long distance photography it packs several state of the art optical and design features which work to counter issues commonly found in this type of lens as a result deep and ultra sharp images are produced thr