Tamron 28-300mm f/3.5-6.3 XR DI VC (Vibration Compensation) Macro for Nikon DSLR Catalog #: TM28300VCNA MFG Part #: AF020N-700 State of the Art Vibration Compensation Mechanism (VC) reduces blurred images induced by camera movement Remarkably Compact at less than 4" long and weighing only 19.4oz. Recommended Accessories In The Box MAIN FEATURES 1. VC (Vibration Compensation) Mechanism Reduces Hand-shake The proprietary VC (Vibration Compensation) mechanism developed by Tamron features a triaxial configuration using three pairs of driving coils and slide balls around the compensator group of the lens' optical system. Since the compensator lenses are supported with rolling friction of the balls, the response performance is enhanced and the construction is simple, which results in the compactness of the lens. The optical system uses a number of lens elements made from special optical glass materials including XR (high refraction index) glass elements, GM (glass-molded aspherical lens) elements, hybrid aspherical