Features: brand new and high quality Solid full metal mount lens adapter allows Mamiya 645 M645 lens to fit on Fuji GFX 50S GFX 50R GFX 100 full frame mirrorless camera body. There is no electronic element in the adapter, aperture and focusing must be manually control. Precise fit and solid connection - lens has no for play, for gap or wiggling when mounted on adapter and no adjustments are required to fit your lens. All metal precision processing, anodized aluminum construction, solid and durable for long for time use. Made of durable aluminum alloy materials. Specifications: Material: Aluminum Alloy Color: Black Package Includes: 1 Piece Lens Adapter Ring note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you mind. Due to the difference between different monitors, the picture may not reflect the actual color of the item.