Tamron 20-40mm f/2.8 Di III VXD arrives for Nikon Z with same optics as the Sony version

Tamron has extended its compact 20‑40mm f/2.8 Di III VXD zoom to Nikon Z mount, four years after the lens first appeared for Sony E. The company says the Z variant retains the optical arrangement from the original Model A062 while adapting the mechanics and mount for Nikon’s mirrorless system.

Optically the lens remains unchanged: Tamron builds it from 12 elements arranged in 11 groups, with a nine‑blade, circular diaphragm. The aperture range runs from f/2.8 to f/22, and Tamron lists the diagonal angle of view as 94°30′ to 56°49′. Close‑focusing figures are strong for a short standard zoom: minimum object distance is 0.17m / 6.7in at the 20mm end and 0.29m / 11.4in at 40mm, with maximum magnifications of 1:3.8 and 1:5.1 respectively. On Nikon’s APS‑C Z bodies the lens covers roughly a 30-60mm equivalent range.

Autofocus is driven by Tamron’s VXD system; the company notes the lens "uses TAMRON’s VXD linear motor." Tamron describes the focus drive as "fast, quiet and precise for both stills and video." The Z version supports Nikon Z features such as hybrid AF, Eye AF and M/A mode, and will take advantage of in‑camera corrections for shading, chromatic aberration and distortion where a body provides those functions; Tamron warns that feature support varies by camera model.

Mechanically the Nikon Z variant is a little larger than the Sony E mount original. Tamron lists the Z lens at 88.7mm / 3.5in long from front element to mount face and 380g / 13.4oz in weight, compared with 86.5mm / 3.4in and 365g / 12.9oz for the E mount. Maximum diameter is 74.4mm / 2.9in, and the front filter thread is 67mm. The lens has no aperture ring and lacks optical stabilization, so it relies on in‑body image stabilisation when the camera provides it; Tamron notes Nikon’s APS‑C Z bodies do not offer in‑body stabilisation.

Construction is moisture‑resistant rather than fully weather‑sealed, and the front element carries a fluorine coating to help repel water and grease. The barrel includes no dedicated mechanical stabiliser and no aperture ring; a flower‑shaped hood and front and rear caps are supplied in the box.

Tamron also confirms software compatibility: the lens works with Tamron Lens Utility for parameter adjustment and firmware installation. Firmware updates require the desktop version of the utility and a separately sold connection cable; Tamron cautions that the "mobile app does not support firmware updates." That means updates must be performed through a computer and the specific cable rather than wirelessly from a phone.

Tamron positions the 20‑40mm as a compact, fast standard zoom for full‑frame mirrorless cameras, and points to its own market research when comparing size and weight within the f/2.8 standard‑zoom category. The company says the Z variant is developed, manufactured and sold under a licence agreement with Nikon, putting it in the same licensing pattern as some recent third‑party Z lenses from other makers.

Inside the lens, designers have maintained the short, fast‑aperture intent: the combination of a bright f/2.8 maximum and the 20–40mm range is aimed at photographers who want a compact walkaround zoom that still handles low light and background separation. The nine‑blade diaphragm is described as maintaining a near‑circular shape out to about two stops down from maximum aperture, which should help highlight rendering when shooting wide open or slightly stopped down.

Tamron’s figures show the optical construction and handling package remains tailored toward portability and stills/video use: modest weight, short length and a 67mm filter size make the lens an easy fit in light kits. The close‑focus capability at the wide end increases its usefulness for environmental close work and tighter detail shots without switching to a macro lens.

Tamron has set a global price of $729 / €709.99 / £614.99 and says the Nikon Z version will be available from October 22, 2026. As with any mount conversion, photographers should check body compatibility notes for AF features and lens corrections, since Tamron lists support as varying by camera body.

The new Z‑mount 20‑40mm joins a growing number of compact, wide‑to‑standard fast zooms aimed at photographers who prefer a small footprint over larger three‑lens kits. The lens’s combination of a fixed f/2.8 aperture, VXD linear motor AF and the same optical formula as the Model A062 will make it familiar to anyone who already uses the Sony E version, while the small increases in length and weight reflect mount‑specific adaptations and mechanical differences.

What Tamron has included in the box makes the lens ready for immediate use: hood, front and rear caps, and the usual documentation. Photographers who need firmware updates should plan to use a desktop computer and the company’s cable at update time rather than expecting an over‑the‑air mobile route.

Taken together, the Nikon Z version of the 20‑40mm f/2.8 Di III VXD aims to offer the same optical character as the original Model A062 while fitting into Nikon’s Z system with lens utilities and camera‑side correction support, and a small increase in physical size to suit the mount.