[Arca Compatible ] Featuring an 80mm plate with both 1/4 inch and 3/8 inch screw holes this mount seamlessly integrates with arca style tripod heads clamps and panoramic heads. the mechanism allows for fast transitions between handheld and tripod mounted . [Balanced Weight Distribution] This mounting solves the front heavy problem of long telephoto lenses by transferring the weight directly to your tripod. the improved weight distribution reduces camera body stress and minimizes vibration for sharper images especially during long exposure shots. [Protective Lens Contact Surface] The specially designed contact surface prevents any damage to your valuable lens. before installation ensure all stickers are removed from the lens mounting area for proper fit. once installed the allows smooth 360 degree rotation just like original manufacturer rings. [Aircraft Grade Aluminum Construction] Crafted from premium aluminum alloy using cnc machining this tripod collar offers exceptional durability without adding unnecessary weight. the material ensures long lasting performance even in challenging outdoor conditions. [Perfect Fit for Your Lens] This professional tripod mount is specially designed for the 50 400mm f4.5 6.3 di iii vc super telephoto lens ensu optimal balance and stability during . its precise engineering guarantees a secure fit that won't slip or rotate unexpectedly during use.