The Tamron 50-400mm F/4.5-6.3 Di III VC VXD is a compact and lightweight full-frame lens designed for Sony mirrorless cameras, offering high performance across its entire focal length range. It delivers superb image quality from 50mm to 400mm, thanks to the strategic placement of special lens elements. The lens features a VXD linear motor focus mechanism, ensuring quiet and responsive autofocus. This model is compatible with Sony E-mount cameras.