1、Wide Compatibility: Lens mount adapter is compatible for FD mount camera lens, compatible for AI mount cameras, such as for D850, D810, D750, D7500, D6500, etc. 2、Aluminum Alloy Material: Made of aluminum alloy with anodized oxidation process, high strength, sturdy, strong, wearproof, beautiful workmanship, rust resistant for long lasting use. 3、Versatile Functionality: Support full manual control, manual focus, manual exposure, aperture priority, anti reflective coating, and infinite focus, catering to professional photographers' needs. 4、Perfect Fit: The aluminum alloy lens mount adapter perfectly fits the camera and lens, providing a tight and secure connection. Smooth surface for effortless mount. It is easy to install and remove. 5、Compact and Portable: This lens mount adapter is portable and convenient to carry around. It takes up minimal space, fitting comfortably in your camera bag or pocket, ready to enhance your photography wherever you are.