The Tamron 17-70mm f/2.8 Di III-A VC RXD is a premium standard zoom lens built for Sony E-mount APS-C mirrorless cameras, delivering a versatile 25.5-105mm equivalent range — from wide-angle landscapes to short-telephoto portraits — all at a constant f/2.8 maximum aperture. Whether you are shooting in dimly lit interiors or chasing golden-hour portraits, the bright f/2.8 design ensures consistent exposure, beautiful background separation, and outstanding low-light capability across the entire zoom range.
Tamron has packed this lens with three aspherical elements, two Low Dispersion elements, and BBAR multi-coating to deliver edge-to-edge sharpness, accurate color rendering, and excellent flare control. Combined with the near-silent RXD autofocus motor, built-in VC image stabilization, and a moisture-resistant construction with fluorine-coated front element, the 17-70mm f/2.8 is an all-weather, all-purpose workhorse for photographers and videographers who refuse to compromise.
Key features
- Constant f/2.8 Aperture Throughout the Zoom: Enjoy consistent brightness and precise depth-of-field control from 17mm all the way to 70mm, ideal for low-light and shallow-focus photography.
- Versatile 25.5-105mm Equivalent Range: Covers wide-angle through short-telephoto in a single lens, making it the perfect everyday walk-around solution for Sony APS-C shooters.
- VC Image Stabilization for Steadier Shots: Built-in Vibration Compensation reduces the impact of camera shake during handheld shooting and video recording, especially in challenging low-light situations.
- Near-Silent RXD Autofocus Motor: The Rapid eXtra-silent stepping Drive delivers fast, smooth, and quiet focusing — critical for video work — while supporting full-time manual focus override and Sony Direct Manual Focus compatibility.
- Advanced Optical Design for Superior Image Quality: Three aspherical elements (including a hybrid type) correct distortion and spherical aberrations, while two LD elements minimize chromatic aberration and color fringing for crisp, accurate results.
- Weather-Resistant Build with Fluorine Coating: A moisture-resistant construction and fluorine-coated front element protect against dust, dirt, moisture, and fingerprints, keeping you shooting in unpredictable outdoor conditions.
Specifications
| Mount | Sony E-Mount (APS-C) |
|---|---|
| Focal Length | 17-70mm (25.5-105mm equivalent) |
| Maximum Aperture | f/2.8 (Constant) |
| Aperture Range | f/2.8 to f/16 |
| Image Stabilization | VC (Vibration Compensation) |
| Autofocus Motor | RXD Stepping Motor (Rapid eXtra-silent Drive) |
| Minimum Focusing Distance | 7.5 inches (approx. 19cm) |
| Maximum Magnification | 1:4.8 |
| Diaphragm Blades | 9 (Rounded) |
| Special Elements | 3 Aspherical Elements, 2 Low Dispersion Elements |
Frequently asked questions
Is the Tamron 17-70mm f/2.8 Di III-A VC RXD compatible with full-frame Sony cameras?
No — this lens is specifically designed for APS-C-format Sony E-mount mirrorless cameras. On an APS-C body it delivers an equivalent focal length of 25.5-105mm. While it can physically mount on a full-frame Sony body, it is optimized for the smaller APS-C sensor.
Does this lens have image stabilization, and how close can it focus?
Yes, the Tamron 17-70mm f/2.8 features a built-in VC (Vibration Compensation) image stabilization system to reduce camera shake for both photos and video. Its minimum focusing distance is just 7.5 inches (approximately 19cm), achieving a maximum magnification of 1:4.8 for impressive close-up shooting.
How does the autofocus perform for video recording on Sony mirrorless cameras?
The lens uses Tamron's RXD (Rapid eXtra-silent stepping Drive) motor, which is specifically engineered for quiet, smooth, and fast focusing — making it well-suited for video use where AF noise would otherwise be picked up by the microphone. It also supports full-time manual focus override and is compatible with Sony's Direct Manual Focus function.
