Tamron 17-70mm F2.8 Coming to Canon RF and Nikon Z APS-C

Tamron's 17-70mm F2.8 Di III-A VC RXD is coming to Canon RF and Nikon Z APS-C mounts, joining existing Sony E and Fujifilm X versions. The RF version gets two hardware switches for AF and OIS not found on any other variant. F2.8 constant aperture across a 26-105mm equiv. range on Nikon APS-C, 28-112mm equiv. on Canon, where most competing F2.8 APS-C zooms stop at around 50-55mm equiv.