Yammee IS-RF140 Lens Collar Support for RF 100-400mm f/5.6-8 IS USM

Custom-made tripod collar designed specifically for the RF 100-400mm f/5.6-8 IS USM lens (model IS-RF140). Manufactured from aviation-grade aluminum with CNC precision machining, a hollow weight-reduction structure, and a polished, anodized surface for a refined appearance and durable finish. The tripod ring’s inner wall features an irregular structure with reserved switch openings so lens controls remain accessible. The collar is fixed (cannot be rotated) and supports horizontal shooting only — vertical orientation is not supported. A 50mm-long Arca standard quick release plate is integrated into the bottom of the ring, allowing direct pairing with 39mm Arca-swiss tripod balls/heads, panoramic gimbals or clamps. 1/4" and 3/8" screw holes are provided, and stainless steel anti-slip screws are reserved so the lens can be mounted directly to a tripod. The dovetail slot on the base conforms to the 39mm Arca-Swiss standard and is compatible with ISHOOT/RRS/ARCA-SWISS Arca 39mm tripod heads. Fits iShoot models IS-JZ50/ IS-JZ64/IS-QJ58/IS-JZ60BK/IS-JZ70MFT/IS-JZ80BK etc.