Tamron has expanded the 17-70mm F/2.8 Di III-A VC RXD (Model B070) lineup with two new mount options — Canon RF and Nikon Z — joining the Sony E and FUJIFILM X versions that have been available since 2021 and 2022. The Nikon Z mount variant is listed at Rs.53,600 (Lowest Price on July 19, 2026), and the Canon RF mount variant is listed at the same Rs.53,600 (Lowest Price on July 19, 2026).
The lens is a constant F2.8 aperture APS-C standard zoom covering a 17-70mm focal length, giving a 4.1x zoom ratio that Tamron describes as class-leading among fast-aperture APS-C standard zooms. Key features include built-in VC (Vibration Compensation), the RXD stepping-motor autofocus system, and a 0.19m minimum object distance at the wide end.
The Sony E-mount version of the 17-70mm F/2.8 Di III-A VC RXD, which launched earlier, is currently listed at Rs.44,000 (Lowest Price on July 19, 2026), against an MRP of Rs.67,500.
Pricing & Availability
| Mount | Launch Price | Link |
|---|---|---|
| Nikon Z Mount | Rs.53,600 | Check on Amazon India↗ |
| Canon RF Mount | Rs.53,600 | Check on Amazon India↗ |
| Sony E-mount (Black) | Rs.44,000 | Check on Amazon India↗ |
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What We Like About the Tamron 17-70mm F/2.8 Di III-A VC RXD (Model B070)
- Constant F2.8 aperture across the full zoom range — keeps the same amount of light gathering from 17mm to 70mm, useful in low light without needing to stop down
- 4.1x zoom ratio — Tamron states this is class-leading among F2.8 APS-C standard zooms, covering wide-angle to mid-telephoto in one lens
- Built-in VC (Vibration Compensation) — reduces the effect of camera shake at slow shutter speeds
- 0.19m minimum object distance at the wide end — allows close-up shooting without a dedicated macro lens
- 525g weight (Sony E-mount) — keeps the lens compact for an APS-C fast-aperture standard zoom
New Mount Additions: Canon RF and Nikon Z
Tamron’s 17-70mm F/2.8 Di III-A VC RXD was first released for Sony E-mount on January 14, 2021, followed by a FUJIFILM X-mount version on July 8, 2022. The Canon RF and Nikon Z mount versions released on July 2, 2026, bringing the lens to APS-C mirrorless shooters on all four major mount systems.
The Canon RF mount version carries two physical switches not present on the Sony or Fujifilm variants — an AF/MF switch and a VC ON/OFF switch — positioned on the lens barrel for quick access during shooting. Both the Canon RF and Nikon Z versions support firmware updates through the TAMRON Lens Utility application, letting owners update lens firmware from a computer without needing to route it through the camera body. Tamron notes this firmware update path is not available through the mobile version of the app.
Optical Construction and Aperture
The 17-70mm F/2.8 Di III-A VC RXD uses 16 elements in 12 groups, including two LD (Low Dispersion) elements, two GM (Glass Molded Aspherical) elements, and one hybrid aspherical element. Tamron states this combination is aimed at maintaining resolution and contrast toward the corners and edges of the frame, not just the center.
Aperture is controlled through a 9-blade circular diaphragm, with a minimum aperture of F22. Tamron notes the diaphragm holds close to circular shape up to two stops down from maximum aperture, which affects the shape of out-of-focus highlights in images.
Vibration Compensation and Autofocus
VC (Vibration Compensation) is built into the lens to counter camera shake during hand-held shooting at slow shutter speeds — Tamron cites indoor, twilight, and nightscape shooting as scenarios where this comes into play. The same VC system also applies stabilization during video recording.
Autofocus runs on Tamron’s RXD (Rapid eXtra-silent stepping Drive) motor, which drives the focusing group directly rather than through a reduction gear, paired with a position sensor for focus accuracy. Tamron states the RXD system is designed for quiet operation, aimed at both silent-shooting stills work and video recording where operational noise would otherwise be picked up by an on-camera microphone. On the Canon RF and Nikon Z versions, Tamron notes autofocus responsiveness may decrease when tracking subjects during zooming in video mode.
The lens is also built to suppress focus breathing — the shift in angle of view that can occur when focus distance changes — which affects how consistent framing looks during video work when pulling focus.
Close-Up Range and Build
Minimum object distance is 0.19m (7.5in) at the wide end and 0.39m (15.4in) at the telephoto end, with a maximum magnification ratio of 1:4.8 at wide and 1:5.2 at telephoto. This lets the lens be used for close subjects such as tabletop shots or product photography without switching to a dedicated macro lens.
Build includes moisture-resistant construction, BBAR-G2 coating, and a fluorine coating on the front element to resist fingerprints and moisture. Weight and length vary slightly by mount — 525g for Sony E-mount, 530g for FUJIFILM X-mount, 540g for Nikon Z mount, and 530g for Canon RF mount. Maximum diameter is 74.6mm across all mounts, and the filter size is a 67mm thread, which Tamron notes is shared across most of its mirrorless lens lineup to allow reuse of filters between lenses.
Tamron 17-70mm F/2.8 Di III-A VC RXD (Model B070) Specifications / Technical Details
| Specification | Details |
|---|---|
| Model | B070 |
| Focal Length | 17-70mm (25.5-105mm full-frame equivalent for Sony/Nikon/Fujifilm; 27.2-112mm for Canon RF) |
| Maximum Aperture | F2.8 |
| Minimum Aperture | F22 |
| Angle of View (diagonal) | 79°55′-23°00′ (Sony/Fujifilm), 80°37′-23°17′ (Nikon), 77°0′-21°52′ (Canon) |
| Optical Construction | 16 elements in 12 groups |
| Minimum Object Distance | 0.19m/7.5in (Wide), 0.39m/15.4in (Tele) |
| Maximum Magnification Ratio | 1:4.8 (Wide) / 1:5.2 (Tele) |
| Vibration Compensation | Yes (VC) |
| Filter Size | 67mm |
| Maximum Diameter | 74.6mm |
| Length | 119.3mm (Sony E), 119.6mm (Fujifilm X), 121.3mm (Nikon Z), 117.3mm (Canon RF) |
| Weight | 525g (Sony E), 530g (Fujifilm X), 540g (Nikon Z), 530g (Canon RF) |
| Aperture Blades | 9 (circular diaphragm) |
| Standard Accessories | Flower-shaped hood, front cap, rear cap |
| Mount Options | Sony E, FUJIFILM X, Nikon Z, Canon RF |
| Release Date | January 14, 2021 (Sony E), July 8, 2022 (FUJIFILM X), July 2, 2026 (Canon RF & Nikon Z) |
What’s in the Box
- Tamron 17-70mm F/2.8 Di III-A VC RXD (Model B070) lens
- Flower-shaped lens hood
- Front lens cap
- Rear lens cap
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Note: Specifications listed above are based on available information and may not be 100% accurate. Please visit the official Tamron website or Amazon product page to verify complete and up-to-date specifications before making a purchase decision.
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