IS-RF140 Tripod Mount Collar Bracket (39mm Arca-Swiss) for 100-400mm f/5.6-8 IS Lens

Custom-fit tripod collar designed specifically for the 100-400mm f/5.6-8 IS lens. Precision machined with a hollow weight-reduction layout, then polished and anodized for a refined appearance and durable finish. The inner wall of the tripod foot includes irregular cutouts and reserved holes that do not interfere with lens operation. Note: the collar does not rotate and only supports horizontal mounting; vertical mounting is not supported. A 50mm standard quick-release plate is integrated on the bottom, matching the 39mm Arca-Swiss standard so it can be used directly with compatible Arca-Swiss style tripod heads, ball heads, panoramic heads, and clamps. Both 1/4" and 3/8" screw holes are provided, and stainless-steel anti-slip screws are included so the lens can be mounted directly to a tripod. Bottom slot conforms to the 39mm Arca-Swiss standard. Compatible with IS-JZ50/ IS-JZ64/IS-QJ58/IS-JZ60BK/IS-JZ70MFT/IS-JZ80BK.