Sigma has announced the launch of a new APO 50-150mm F2.8 EX DC HSM lens. Specially designed for digital SLR cameras with an APS-C size image sensor, the F2.8 lens has a compact and lightweight construction of 76.3mm in diameter, 135.1mm in length and weighing just 770g.
The lens features four SLD (Special Low Dispersion) glass elements for chromatic aberration correction, while a HSM (Hyper Sonic Motor) system ensures quiet and prompt auto focusing with full time manual focus override.
The addition of the 1.4x EX DG APO or 2x EX DG APO Tele Converters (optional extras) produces a 70-210mm F4 AF tele-zoom lens and a 100-300mm F5.6 AF ultra-telephoto zoom lens respectively.
The lens wil be available later this month priced £549.99.

SUMMARY OF KEY FEATURES
Focal Length: 50-150mm
Minimum Aperture:F22
Lens Construction:18 Elements in 14 Groups
Angle of View:27.9°-9.5°
Number of Diaphragm Blades:9 pcs
Minimum Focusing Distance:100cm (39.4?)
Maximum Magnification:1?5.3
Filter Size:67mm
Lens Hood:Bayonet Type
Dimensions:76.3mm x 135.1mm
Weight:770g