BlattWorld, Item Details: Sigma 800mm F5.6 APO EX HSM Lens

Sigma's APO 800mm F5.6 EX is one of three new ultra telephoto lenses. It is an Apochromatic ultra-telephoto lens with a fast F5.6 maximum aperture, and incorporates two Extraordinary Low Dispersion glass elements (Abbe number 90.3), to reduce chromatic ab

erration to minimum limit. It also incorporates internal focusing which enables responsive and fast auto focus speed. The AF drive for Sigma SA, Canon and Nikon S.L.R. cameras features the ultra-quiet Hyper Sonic Motor (H.S.M.). This new lens also incorpo

rates a rotary filter holder in the rear part of the lens barrel, which enables the use of a polarizing filter. Sigma's dedicated APO EX Tele Converter 1.4x MF and 2x MF can be used with this lens. The lens materials used in this new lens are lead and ars

enic free ecological glass..