Sadly for Nikon users, the F mount has one of the longest registers ever.
(Mechanically) adapting a lens designed for a certain system to one with a shorter register is easy: just manufacture an extension tube of the correct length. The ability of controlling the lens will be mostly lost but this is less of an issue with lenses with mechanical aperture rings.
Doing the opposite is impossible: there are thus two possible solutions to the problem.
Design an adapter adding the least possible distance and let it be: the lens will be limited to close-up work and will become unsuitable for general photography.
Add a corrective lens: The original range of available focusing distances will remain available, but quality will degrade (how significant the change will be depends on the specific implementation, with most adapters only being optimized for the center of the image).
This relationship, when looked at backwards, also makes lenses for a longer register relatively more valuable, as they can be converted to more systems. This was the entire premise behind the ideation of the T mount and the Adaptall series.