The Fotodiox Pro lens adapter enables compatibility between Arri bayonet mounts for 16mm and 35mm film lenses and Sony E-Mount digital cameras. This precision-engineered adapter maintains full electronic communication between the lens and camera body, preserving autofocus functionality and aperture control. Made from durable brass and aluminum alloy with a matte black finish, the adapter features precise manufacturing tolerances of ±0.02 mm to ensure optimal lens alignment and prevent light leaks. The adapter measures 25 mm in length with a diameter of 72 mm and weighs 85 g, adding minimal bulk to your camera setup. Internal contacts are gold-plated for reliable signal transmission and corrosion resistance. This adapter supports both manual and automatic exposure modes while maintaining infinity focus capability. The mounting system includes a secure locking mechanism with positive feedback upon engagement. It is compatible with Sony Alpha series cameras, including a7, a9, and a6000 models. The adapter works with Arri standard bayonet mount lenses produced for 16mm and 35mm film formats, offering cinematographers and photographers enhanced creative possibilities through professional cinematography optics. The all-metal construction ensures long-term durability and consistent performance under professional working conditions. The adapter requires no additional tools or modifications for installation and preserves the original lens flange distance specifications.