Tamron's brilliant full-frame all-in-one for Sony FE — 28-200mm starting at f/2.8 with excellent optics.
The Tamron 28-200mm f/2.8-5.6 Di III RXD (Model A071) was released in 2020 as a compact full-range zoom for Sony FE full-frame bodies, covering 28-200mm with a remarkable f/2.8 at the wide end. RXD (Rapid eXtra-silent Drive) provides fast, quiet AF. At 575g and 67mm filter thread it is lightweight for a 7.1x full-frame zoom starting at f/2.8. Minimum focus distance of 0.19m at 28mm.
The optical design uses 18 elements in 14 groups including LD, XLD (extra-low dispersion), and aspherical elements. Seven rounded aperture blades. The 67mm filter thread. At 575g the lens is moderate. Minimum focus distance of 0.19m at 28mm (0.80m at 200mm). RXD actuator-based drive provides fast, quiet AF. Variable aperture from f/2.8 at 28mm to f/5.6 at 200mm.
The f/2.8 at 28mm is the 28-200mm's headline differentiator: conventional all-in-one travel zooms start at f/4 at the wide end, while this lens provides one full stop more light at 28mm — useful for interior and low-light environmental wide shots. The 0.19m MFD at 28mm enables very close-wide environmental compositions. The 575g weight is competitive for the focal length range and maximum aperture.
On the used market the Tamron 28-200mm f/2.8-5.6 Di III RXD is available at mid-range travel zoom pricing. Condition checks: RXD AF response, 67mm front element for marks, zoom ring smoothness across the 7x range. Compatible with all Sony FE-mount full-frame and APS-C E-mount bodies.