The 17-28mm f/2.8 Di III RXD from Tamron is a versatile wide-angle zoom lens for full-frame Sony E-mount mirrorless cameras. It can also be used with APS-C models where it will provide a 25.5-42mm equivalent focal length range. Its bright maximum aperture of f/2.8 offers control over depth of field and benefits working in low light conditions, while its ultra-wide to wide focal length range makes it well-suited to shooting landscape, astrophotography and architecture.

The lens uses an RXD (Rapid eXtra-silent stepping Drive) autofocus motor for fast and quiet autofocus performance to suit both stills and video recording, and full-time manual focus override allows for fine-tuned focus adjustments. This is combined with a minimum focusing distance of 19cm for capturing close-up subjects. A moisture-resistant construction, along with a fluorine coated front element, protect the lens against fingerprints and smudging.