SIGMA 17-50mm F2.8 EX DC HSM

Sigma has discontinued the 17-50mm F2.8 EX DC OS HSM for Sony and for Pentax.
They have released a non-stabilised version of the lens for Sony and Pentax systems, the SIGMA 17-50mm F2.8 EX DC HSM
External Dimensions and other features remain the same as the OS version, however the non-OS version is a tiny fraction lighter at 550g vs 565g for the OS version. Note that if the camera body does not support HSM, auto focus will not be available.

Lens Construction:17 Elements in 13 Groups
Angle of View:79.7-31.7 degrees
Number of blades:7 pcs (Rounded diaphragm)
Minimum Aperture:F22
Minimum Focusing Distance:28cm (11in.)
Maximum Magnification:1:5.0
Dimensions:Diameter 83.5mm × Length 91.8mm / 3.3in. × 3.6in.
Weight:550g (20.3oz.)