lanema IS-RF140 Lens Collar Tripod Mount for RF 100-400mm f/5.6-8 IS USM — 39mm Arca-Swiss Dovetail, 50mm Arca Plate

Specifically engineered to fit the RF 100-400mm f/5.6-8 IS USM lens, the lanema IS-RF140 tripod collar mirrors the lens’ shape and structural details for a precise fit. Built from aviation-grade aluminum and finished with CNC precision machining, the collar uses a hollowed weight-reduction design and receives polishing plus anodized surface treatment for a durable, attractive finish. The inner wall has an irregular textured structure and includes reserved access holes for the lens switches so switch operation is not impeded. Note: the collar is fixed and does not rotate — it only supports horizontal shooting and is not intended for vertical shooting. A 50mm-long Arca standard quick-release plate is incorporated on the bottom, allowing direct pairing with 39mm Arca-Swiss tripod balls, panoramic gimbals, clamps and similar heads. 1/4" and 3/8" screw holes are provided along with stainless steel anti-slip screws so the lens can be mounted directly to tripods. The dovetail slot on the underside follows the 39mm Arca-Swiss standard for compatibility with ISHOOT/RRS/ARCA-SWISS tripod heads (Arca 39mm) and is suitable for iShoot models IS-JZ50/IS-JZ64/IS-QJ58/IS-JZ60BK/IS-JZ70MFT/IS-JZ80BK.