The Tamron 50-400mm F4.5-6.3 VC is a compact and lightweight ultra-telephoto zoom lens that provides unparalleled high performance at all focal lengths. Despite the very high zoom ratio, superb image quality is delivered across the entire standard to ultra telephoto range through the effective arrangement of special lens elements. This lens covers a 50mm standard focal length up to 400mm at the ultra-telephoto range, offering outstanding image quality throughout the entire 50-400mm zoom. It provides full-frame (FX) users an extensive 8x zoom ratio and optical stabilisation (VC) all within an extremely lightweight and portable design.