About Sigma 18-50mm F2.8-4.5 DC HSM Sony Mount Lens for (Alpha 65 & Alpha 77):
Does NOT have the OS so it is compatible with Alpha 65 & 77 HSM (Hyper-Sonic Motor) ensures a quiet and high-speed auto focus Internal focus & zooming systems Compact and lightweight at only 14 ounces
Features Sigma 18-50mm F2.8-4.5 DC HSM Sony Mount Lens for (Alpha 65 & Alpha 77):
- Lens Construction 16 Elements in 12 Groups Angle of View 69.3° – 27.9° Number of Diaphragm Blades 7