This latest version of the Sigma APO 120-300mm F2.8 EX DG
OS HSM is pleased to announce the inclusion of Optical Stablization(OS) which is
critical to equipment sporting this focal range allowing for hand-held tele-photography
and the use of shutter speeds approximately 4 stops slower than would otherwise
be possible. Sigma's new splash-proof feature is also included preventing dust
and precipitation from getting inside the lens. One SLD and two FLD glass
elements provides maximum correction of chromatic aberrations. The super
multi-layer coating reduces flare and ghosting, and the lens design incorporates
an inner focusing and inner zooming system to ensure sharp images throughout the
entire zoom range.
Improved optical performance provides excellent correction
of sagittal coma flare and ensures ultra-high resolution, comparable to a fixed
focal length lens. The HSM (Hyper Sonic Motor ensures quiet and high speed AF,
while allowing full-time manual focus override. A truly unique product which is
a rarity in the photo industry, this lens is the only lens of its kind on the
market; a professional zoom lens that also features a fast aperture.
