The 50-300mm f/4.5-6.3 Di III VC VXD Lens from Tamron supplies extreme versatility to Sony E-mount full-frame camera systems. VC (Vibration Compensation) image stabilization reduces camera shake and contributes to sharper images, which is particularly useful when shooting at the maximum 300mm focal length. The lens is driven by a VXD linear motor focus mechanism that enables quick and precise autofocus performance with impressive subject tracking throughout its zoom range. Moisture-resistant construction for increased dependability in harsh environments. Fluorine-coated front lens element to prevent fingerprints and smudging. Zoom lock switch to keep the lens retracted while not in use.