※Please be sure to read the profile. Purchase constitutes agreement with the profile contents※ This item is not subject to price reduction. Comments requesting price reductions will be deleted. This is a K&F mount adapter, well-known among old lens enthusiasts. Contax/Yashica lenses for old lenses can be used with Nikon Z mount. Since there are no electronic contacts, focus, exposure, etc. are all manual operations. The inside of the mount adapter has been treated for internal reflection. Infinity focus is supported. This is a new item. The original plastic storage case is not included. Please note that it will be opened before shipping to check for initial defects and to test the lens and camera attachment. A new lens cloth (15 x 15 cm) will be included as a bonus. The mount adapter is not a genuine product of the manufacturer. Please research thoroughly before purchasing, as there are lenses that are not compatible. If you have any questions, please contact us via comments. Free shipping, shipped via Yu-Packet Post Mini. No plastic case for storage is included. It will be wrapped in bubble wrap and shipped in a Yu-Packet Post Mini envelope. Same-day shipping is basically not possible. Also, shipping is not available on weekends, holidays, and festivals. Please purchase with plenty of time for arrival.