This is a mount adapter for using Sony E-mount lenses on Nikon Z-mount mirrorless cameras. It is a new, unused product. This product is made by Viltrox, and while it is a later entry in this type of adapter, it is highly regarded for its performance. It is sold for 26,900 yen on the Viltrox official store on Amazon. The firmware is updated regularly, and the latest V4.4X supports Nikon ZR and SIGMA 35mm F1.2 II ART DG. This product has been updated to the latest V4.41, and operation has been confirmed. V4.41 is a version suitable for models with in-body image stabilization (IBIS) on the camera side. Furthermore, detailed instructions for safe updates will be provided to the purchaser. Regarding compatibility, as with general mount adapters, operation is not guaranteed for all combinations. Please note that it may not work depending on the compatibility between the camera and the lens. A Japanese manual is included, so you can use it with confidence. 【Main Features】 ・Ultra-thin 4mm conversion adapter Achieves autofocus compatibility between Sony E-mount lenses and Nikon Z-mount mirrorless cameras. Compatible models: Nikon Z9, Z6, Z6II, Z7, Z7II, Z5, Z30, Z50, Z50II, Zf, Zfc, ZR, etc. ・EXIF signal transmission & Image stabilization support Transmits EXIF information to the camera, allowing for recording and display of shooting data. Also, for lenses that support image stabilization, the stabilization function is maintained even when using the adapter, enabling more stable shooting. ・Vignetting prevention design The aperture is optimized for the CMOS size, preventing light obstruction and achieving stable depiction. The contact part is also designed to be robust, providing excellent durability. ・Lightweight and highly durable construction Compact design with a thickness of only 4mm and a weight of 52.3g. The precise metal structure ensures high durability and stability. It is also portable and does not burden you during shooting. ・Upgrade support A dedicated upgrade cable is included, allowing for firmware updates.