Tamron's native telephoto zoom for Nikon Z — the 70-300mm Di III with stepping motor AF.
The Tamron 70-300mm f/4.5-6.3 Di III RXD is Tamron's native mirrorless telephoto zoom for the Nikon Z mount system. The Di III designation confirms mirrorless-native design, and RXD indicates the stepping motor AF drive. Covering the essential telephoto range with compact design and quiet AF, it targets enthusiast Nikon Z shooters wanting affordable telephoto reach.
Optical performance is good for the class. Sharpness is very good at shorter focal lengths and respectable at 300mm. The RXD stepping motor provides smooth, quiet AF well-suited to both stills and video. The relatively slow aperture demands good light or high ISO at longer focal lengths. Image quality benefits from the shorter flange distance of Z-mount design.
Nikon Z mount, full-frame. Filter thread is 67mm. Weight is approximately 580 grams — moderate. Build quality is good with moisture-resistant construction. No image stabilisation — relies on Nikon's in-body VR. The compact size pairs well with Nikon Z5, Z6, and Z7 bodies. RXD motor is virtually silent for video.
Growing availability on the used market. Check AF operation and clean optics. An excellent native telephoto for Nikon Z shooters — the RXD motor and compact design make it a strong competitor to Nikon's own Z 70-180mm and the adapted F-mount 70-300mm VR options. Good value for casual wildlife, sports, and travel telephoto work.