Lack of third-party openness
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Lack of third-party openness

However, while the FTZ adapter works very well, in the short term it'll be the only adapter available. Despite the dimensions of the Z-mount being especially well-suited to adapting almost any lens you can think of, Nikon has - perhaps not surprisingly - decided not to share the mount's electronic specifications for aspects such as focus and exposure with other manufacturers.

This has always been true of the older F-mount, where Tamron, Sigma and other companies have reverse-engineered it for years to offer their own lens alternatives. We would have liked to see Nikon be more open in this regard, particularly for those coming from different systems or wanting more video-centric lenses to take advantage of the new video-centric features on the Z7 and Z6.

The relatively open nature of the Micro Four Thirds mount and, to an increasing degree, Sony's E-mount has really helped to flesh out those systems' lens ecosystems. While doing this for the Z-mount may have meant fewer users buying Z-mount Nikkor S lenses in the near term, it would have given early adopters of the Z6 and Z7 the possibility of more lens options outside of those Nikon's indicated on their roadmap.