While Canon seems to be prohibiting third-party manufacturers from using the new RF protocol for lenses, Tamron is introducing its first lens for the Nikon Z-mount. The 70-300mm F/4.5-6.3 Di III RXD is equivalent to the full-frame telephoto zoom already available for Sony E and is suitable for sports, wildlife and nature photography as well as portraits.
Tamron 70-300mm F/4.5-6.3 Di III RXD
Autofocus is based on a quiet RXD (Rapid eXtra-silent stepping Drive) motor, so no distracting focusing noise is recorded in video mode. A sensor detects the current focus setting of the lens to ensure fast and precise automatic focusing, even with fast-moving subjects the focus should be continuously tracked.
Weighing 580g, the telephoto zoom lens turns out comparatively light, with a maximum diameter of 77mm. The length is variable, as the tube extends when zooming. The optical system includes 15 elements in ten groups, including a high-precision LD (low dispersion) element to correct for color aberration and other optical errors typically found in telephoto focal lengths.
The lens features a moisture-resistant construction for added protection during outdoor shooting - the bayonet ring and other critical areas of the lens body are sealed against moisture and splashing water - and Tamron&s proprietary BBAR (Broad-Band Anti-Reflection) coating is designed to prevent quality-degrading reflections inside the lens barrel. The TAMRON Lens Utility software is supported.
Tamron does not yet name a price for the 70-300mm F/4.5-6.3 Di III RXD (model A047) (the E-mount version cost about 900 euros at launch), but it is scheduled for release in the fall of 2022.