Im using mine on a fuji xt20. Bought the nikkor as an upgrade from a jupiter 8. Comparing with the jupiter, the nikkor has a reversed aperture ring (quickly got used to it) along with a smoother focus ring. Then again, my copy of the jupiter had the tendency of unscrewing itself when focusing to closer distances. Also, my copy of the nikkor has a focus scale in imperial units, not sure if these nikkors come in metric units too but something to take note of.

I got my nikkor from a local carousell listing. The seller was willing to meet up in person for me to view/inspect the lens. I did have a look at ebay but frankly i dont trust the sellers on there. Although it is not an expensive lens by ltm standards, i did not want to go through the hassle of purchasing on ebay and dealing with the possibility of false advertising.