I beg to differ on the SC and C mount line of lenses. The Nikon RF mount lenses are not "mundane" and non-exotic. It runs the full gamut from 21mm, through 25,28,35,50 and 85 as well as the possibility to mount the the 12 and 15 on the bodies using the F-mount lenses and the F-SC adapter.
It did allow a lot of us to aquire Nikon RF lenses at a reasonable cost and even focal lengths that was too much of a collectible to use.
Cosina did not expect a huge rush of customers - it was more of a service to the Rf Nikon (and Contax users). Volumes were small, most likely in the 1000 units or less - BUT the point is that they did it!
Nikon provided some of the "exotics" with the Millenium and the SP 2005 versions -but at a considerable cost as diid Zeiss with the SC Sonnar 50f1.5!
The R2s and R2C gave us metered Rf bodies too!!
We are looking at a small market and no manufacturer can make "small run" optics and expect to make huge profits for something like this! I am grateful that Mr Kobayashi made all of these lenses available to us that are addicted to what now is a "non-standard" lens mount.
We know thar they have the technology to make lenses like the 35f1.2 in SC mount or ultra high performane lenses like the 50f3.5 Heliar - but it is also a very small group willing to pay for the cost of these and you have to have the market!
At the moment I have 12mm,15mm,21mm,25mm,28mm,35mm f2.5 and 35f1,2, 50f3.5,50f1.5 and 50f2.5 as well as the 85f3.5 in SC mount.
Of the cuff, I cant really see what I miss. Oh, I also have the SC 50f1.5 C-Sonnar.
So. it would be interesting to have a 50f1.1 or a 85 Apo-Lanthar f2, but I cant see anyone paying the cost for these lenses - they would not be cheap!
What would be an exotic that you miss in this line-up? There is actually just a small group who use these lenses and the collectors are busy clutching their boxed 50f1.1's and 21f4's or Macro 50f3.5's to their chest and are really not that interested in "outside" manufactured lenses - OK, they migh go for a 50f1.1 Zunow or something like that!