Sigma has launched the a large aperture telephoto zoom lens designed specifically for digital SLRs

source: http://www.digitalslrphoto.com

Sigma’s proprietary OS (Optical Stabiliser) system enables hand held tele-photography by allowing the use of shutter speeds approximately 4 stops slower than would otherwise be possible.

Six SLD glass elements compensate for chromatic aberrations and provide high image quality throughout the zoom range. The Super Multi-Layer Coating reduces flare and ghosting and ensures sharp and high contrast images even at the maximum apertures.

The lens design adopts an inner focusing and inner zooming system to provide convenient handling and the HSM (Hyper Sonic Motor) ensures quiet and high speed autofocus while allowing full-time manual focus override.

This lens has a minimum focusing distance of 80 cm (31.5″) and a maximum magnification ratio of 1:6.3. The rounded 9 blade diaphragm creates an attractive blur to the out of focus areas of the image.

The expected retail price of the new 50-150mm f2.8 DC OS HSM is £949.99 in UK and will be available in mid April for Canon fit and mid May for Nikon and Sigma fit.

The price in US is $1,099, and the lens is already availabe for purchase.