New IMS solution for heavy Nikon lenses.
The P+S Nikon-F professional lens mount is a positive lock mount of a new design that entirely solves the weakness of the original mount.
Even heavy lenses are held firmly in place and will perform reliably. The original springs have been replaced with bayonets locks that pull the lens on the mount regardless of their weight.
This mount is compatible with IMS (interchangeable mount system created by P+S Techink)