The Tamron SP AF 70-300mm F/4-5.6 Di VC USD is a New Benchmark in Telephoto Zoom Lens Design. This premium, state-of-the-art, telephoto zoom lens is the culmination of decades of outstanding innovation in ultra-long-range zoom optics by Tamron. It provides professional and enthusiast users of full-frame and APS-C format digital SLR cameras with the ultimate in image quality and handling in the telephoto zoom class. Built to exacting SP (Superior Performance) standards, it delivers ultra-high resolution across the image field at all focal lengths, along with the first-ever USD (Ultrasonic Silent Drive) for extraordinary auto-focusing speed and responsiveness. To assure razor sharp imaging when shooting handheld, the SP 70-300mm incorporates VC (Vibration Compensation), Tamron’s exclusive low-friction tri-axial image stabilization system acclaimed for its unsurpassed anti-shake performance. *The Sony mount does not include the VC image stabilization functionality, as the body of Sony digital SLR cameras includes image stabilization functionality. Consequently, the name of the Sony mounted lens, SP 70-300mm F/4-5.6 Di USD, does not include the VC description.