Unused item. This is a mount adapter for using Nikon F-mount lenses with the Fujifilm GFX series cameras. After confirming its operation, I haven't had the opportunity to use it, and it has been stored in a dehumidified storage box. Although this product's price has significantly increased at both authorized dealers (original price: 45,100 yen) and parallel imports, I am offering it at a discounted price. Please refer to the photos for further details. Regarding price negotiations, please use the comment section. Thank you for your consideration.