Consignment shops and yard sales have numerous 1970's Nikon film cameras with pre-AI lenses at nearly dumpster prices.? My understanding is that, of the digital Nikons, only the Df can safely mount these lenses.

• What is different about the Df design that allows safe mounting?
• Would pre-AI lenses safely mount onto a current mirrorless body, using an FTZ?? Assuming all manual settings.
  
• ?I have successfully used my old Minolta Rokkor lenses on my Z6, with a MetaBones adapter. The results are obviously not a match for new equipment, but fun to see the results, and I do have a few "good at the time" Rokkor lenses.