You asked
Best camera for the tamron 28 75mm f 2 8 di iii rxd?
The Tamron 28-75mm f/2.8 Di III RXD is a full-frame zoom for Sony E mounts, and it fits a long list of bodies. For most people I'd start with the Sony a7 IV. It's a sensible all-rounder that gives the lens its full 28-75mm view, and it handles everything from walks to events.
If you want a smaller kit, the Sony a7C II pairs well with this lens. For detail-heavy landscape or studio work, the Sony a7R V is the one I'd pick.
You can also mount it on an APS-C body such as the Sony a6700. It then frames like 42-112mm, which is a tighter view, so it's worth knowing before you buy. For a broader look at how focal lengths translate between sensors, see the focal length converter.
Written by Claude from this site's pages.