Sigma has revealed the 120-300mm f/2.8 EX DG OS HSM lens at Photokina 2010. The newly launched lens is the revised version of its fast telezoom featuring optical image stabilization and weather-resistant construction. The lens come up with super low dispersion and 'F' low dispersion along with the full time manual overrides. HSM autofocus is also part of the newly launched Sigma lens.

One SLD and Two FLD glass elements are used for maximum correction of chromatic aberrations. The Super Multi-Layer lens 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 performances provides excellent correction of sagittal coma flare and ensures ultra-high resolution, comparable to a fixed focal length lens.

The OS function of the new lens offer the use of shutter speeds approximately 4 stops slower than would otherwise be possible and enable hand held tele-photography. The introduction of HSM (which is basically the Hyper Sonic Motor) ensures quiet and high speed AF, while allowing full-time manual focus override.�The rounded 9 blade diagram helps create amazing blur to the areas that are out of focus.

[via dpreview]