My K&F adaptor for my Minola Rokkors on Olympus MFT worked well, so I ordered a Nikkor AI adaptor for adapting a 24 mm to my Leica M-P 240. However, instead of ordering from them directly, I strongly recommend ordering it from a local/regional/national vendor after having made sure that the item is in stock there. On the basis of my most recent experience, one can't rely on timely delivery when ordered from their website (I have waited for my copy for five weeks [delivery time of 15 days was announced], so I finally cancelled my order).