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. MOUNT COMPATIBLE SONY.