The TAMRON 17-50mm F/4 Di III VXD, for full-frame mirrorless cameras with the Sony E-mount, is a practical lens that covers an ultra-wideangle to standard zoom range. This means that, together with a telephoto zoom, it can cover most subjects. On its own, this lens will often be all that is needed for those engaging in travel, architecture, landscape or street photography. With a fixed f/4 maximum aperture, the weight is low at just 460g, despite the large zoom range and weatherproof construction. Photographers will appreciate the lightning-fast focusing, while videographers can be pleased that the focus and zoom rings move very smoothly. The Tamron 17-50mm F/4 Di III VXD is also modestly priced, making it a particularly good buy.