True to tradition, the impending arrival of a new product of note in the Nikon stable is fuelling plenty of speculation. I find much of the info appearing on NR stimulatiing, even useful, even given these are rumours.
But I failed to finish watching a recent Youtube by the tattooed guy proposing the Nikon ML could well be Medium-Format. Such misconstruals of what is known from patents and physics have been fanned on certain forums since at least last year. But IMHO there's a ray of light to be read in a current thread on DPR, where some lucid posts spell out:
(1) why the F-Mount and Z-Mount will enable complementary Nikon lineages to not only persist, but diversify;
(2) Why Nikon are uniquely placed to bring out an efficient adapter to use F-mount lenses on a Z-mount camera;
and (3) How this adapter can feasibly allow use of F-mount glass;
Nikon most certainly have the credentials to deliver yet anther impressive product line. The Nikon 1 and other technology points to this. There are intriguing strategic implications for Nikon as to how their Z-mount (this name is a rumour!) will position the company WRT the competition.
https://www.dpreview.com/forums/thread/4304047I've taken the liberty of posting an instructive diagram that's appeared repeatedly in DPR threads over the past year. The picture that's worth the proverbial 1000 words.... Also fyi an approximated outline of the forthcoming Nikon FX Mirrorless derived from images glimpsed in the official releases.
Some here on NG may find this interesting. The synopsis on what is - and is not - possible in the F - Z adapter may also salve a few concerns (especially for those of us with big investments in Nikkors). I'm quietly confident Nikon will not let us down on this.
Obviously, we will know the real situation on 23rd August
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EDIT :- here are details suggested for new Nikon Z-Mount
https://nikonrumors.com/2018/01/18/a-quick-update-on-the-rumored-nikon-full-frame-mirrorless-camera-z-mount.aspx/