The Tamron 50-400mm F/4.5-6.3 Di III VC VXD is the unprecedented, next-level ultra-telephoto zoom lens for Sony E-Mount full-frame mirrorless cameras. With its wide 50mm starting focal length, full-body shots of subjects like wildlife can be captured in the surrounding environment. The wider end of this unique mirrorless zoom lens is particularly useful for side-line sports, wildlife and other subjects that move closer as you are shooting, allowing you to continue photographing without the need to change lenses. Additionally, users can enjoy the world of half-macro photography with excellent close-up shooting capabilities. Also, users can customize certain functions and update the firmware via the Connector Port by using the dedicated TAMRON Lens Utility. Clearly, the 50-400mm F4.5-6.3 is a brand-new kind of ultra-telephoto zoom lens that combines a 50mm standard focal length, outstanding image quality and highly nimble mobility. This one lens captures a lively world with all the clarity you desire and can guide you to exhilarating new photographic experiences.