Well, you were 100% sure that Nikon would never start mirrorless with a FF body, were you not?
You were also sure that Sony would release their next gen high res sensor as an a7rIII.
And you were very negative about the ability of Nikon to release a competitive successor to the D810.
...
I am really not sure I would buy these lenses, but the rationale for thinking Nikon might release them is:
-
https://petapixel.com/2017/09/07/nikon-patents-2-full-frame-mirrorless-lenses-52mm-f0-9-36mm-f1-2/- the need for them to differentiate themselves. Lenses is the only area where they could do this in a meaningful way and I don't think that an 50mm f1.4 will help achieve this.
- the specs of the mount that has obviously been designed to accomodate very bright glass
- the confidence that the AF of these mirrorless bodies will be able to manage such shallow DoF
- years of frustration among Nikon's engineers about the limitations resulting from the F mount
Besides, Nikon has been doing everything they tried better for years now. This isn't wishful thinking, it is just looking at facts. Now, some of their product planning has been way off, no doubt, but their
engineering is best in class.
Thinking that they will extend their leadership to mirrorless is just common sense, but I agree we will see once the products hit the shelves.
The Sony offering will remain brilliant, shouldn't all photographers be happy about having better options? I would hope Canon to surprise us even more.
Cheers,
Bernard