※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. Canon EF mount lenses for single-lens reflex cameras can be used with Nikon Z mount cameras. For manual operation lenses such as Samyang, focus and aperture can be adjusted, but for Canon EF lenses, the aperture cannot be adjusted because it is an electronic aperture. Also, some lenses may not be able to adjust focus. 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. As a bonus, a new lens cloth (15 x 15CM) will be included. 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 the comments section. Free shipping, will be 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 Saturdays, Sundays, and holidays. Please purchase with plenty of time for arrival.