Tamron's popular APS-C constant f/2.8 zoom for mirrorless — 25.5-105mm equiv with VC and compact design.
The Tamron 17-70mm f/2.8 Di III-A VC RXD launched in 2020 as a constant f/2.8 zoom for APS-C mirrorless covering 25.5-105mm equivalent on Sony E-mount. The wider and longer range than typical 17-50mm f/2.8 zooms makes it uniquely versatile.
Optically very good — sharp throughout with constant f/2.8 providing professional speed. VC stabilisation. RXD stepping motor AF is fast and quiet. The 17-70mm range is wider and longer than typical f/2.8 APS-C zooms — genuine practical advantage.
Sony E mount (also Fujifilm X later) with 67mm filter thread. Approximately 525g — reasonable for constant f/2.8 with this range. Moisture-resistant construction. Minimum focus distance 19cm at 17mm. Internal zoom.
Available used at mid-range prices. The 17-70mm range with constant f/2.8 is unique — wider and longer than Sigma 18-50mm f/2.8. One of the most versatile APS-C zooms available. For Sony APS-C (and Fuji X) shooters wanting maximum f/2.8 zoom range.