Tamron has confirmed a July 2, 2026 launch for the 17-70mm F/2.8 Di III-A VC RXD (Model B070) in Nikon Z and Canon RF mounts, bringing one of its most popular APS-C zooms to two systems that previously had no equivalent. The lens has been a fixture on Sony E and Fujifilm X bodies for years; the news here is the mounts, not the optics. For Canon shooters in particular, the wording in the release matters as much as the spec sheet.