Features: High precision machining, ensures smooth installing and dismantling, can protect both lens and camera body. No lens, no electronic element, it won't affect the optical quality of lens and sensitivity of camera. Supports focus to infinity, aperture priority, manual focus and manual exposure. Supports AV/M mode. Applicable for Leica M39 mount lenses. Suitable for Fujifilm FX mirrorless camera. Save your money instead of buy a new lens, cost-efficient accessory for photography lovers. Specifications: Material: Aluminum + Copper Color: Black Compatible Lens: For Leica M39 mount lens Compatible Camera: For Fujifilm FX mirrorless camera Size: 5.4*5.4*1.3cm / 2.12*2.12*0.51inch Package List: 1 * Lens Adapter 1High precision machining, ensures smooth installing and dismantling, can protect both lens and camera body. 2No lens, no electronic element, it won't affect the optical quality of lens and sensitivity of camera. 3Supports focus to infinity, aperture priority, manual focus and manual exposure. Supports AV/M mode. 4Applicable for Leica M39 mount lenses. Suitable for Fujifilm FX mirrorless camera. 5Save your money instead of buy a new lens, cost-efficient accessory for photography lovers.