Are third party lenses good on nikon f?

Here is what the site says about that.

From Lenses: Third-party lenses: Sigma, Tamron, Samyang and Viltrox make good lenses for many mounts, often for much less than the camera maker's own. Check that the lens supports your body's autofocus features, and that the maker allows third-party lenses on that mount: not every brand does.

From Canon EOS R50: Adapting lenses: EF and EF-S lenses from Canon DSLRs work fully, autofocus included, through Canon's EF-EOS R adapter. Canon licenses only some third-party autofocus lenses for RF, mostly APS-C ones so far.

Quoted from this site's pages.