The comparison with another adapter for a Nikon lens that does not have these problems, showed me that the groove for the connection side of the NX bayonet (camera side), on this adapter is slightly shorter than the groove on my second adapter for my Nikon lens.
Maybe fit this adapter with other Samsung cameras, but with my Samsung NX 3000 it does not work anyway. Meanwhile, I have read in reviews for the other lenses associated with KIWI adapters that the length of the adapter is calculated incorrectly and as a result, a blur results. Up to this test I am certainly not penetrated and the adapter will unfortunately have to return. I would have saved me and others like this unnecessary effort.
In view of the difference is apparent. The left adapter is functioning adapter for Nikon lens and the right is the non-functioning Kiwi adapter for my M42 lenses.
Conclusion: Does not work on Samsung NX 3000