Features: - Upgraded IS-RF100 lens collar support designed specifically for the RF 100mm f/2.8L Macro IS USM lens. Supports both horizontal and vertical shooting. For vertical orientation, loosen the knob to rotate the lens easily. - Constructed from aerospace-grade aluminum alloy, precision CNC machined. Lightweight hollow design with polished and anodized surface finish for durability and long service life. - Tripod mounting ring features a split-ring structure. Edges and corners are smoothly polished. Interior lined with protective plastic film to prevent lens contact damage. - Plate length approximately 70 mm (2.75 in), includes built-in camera quick-release plate compatible with tripod heads. Equipped with standard 1/4" and 3/8" threaded screw holes. - Bottom features a 39 mm standard RRS-compatible quick-release plate interface, compatible with RRS and Arca-Swiss tripod ballheads, pan heads, and clamps. Specifications: - Material: Aluminum alloy + polycarbonate (PC) - Color: Black - Plate Length: Approx. 70 mm (2.75 in), with 1/4" and 3/8" screw holes - Compatible Lens: RF 100mm f/2.8L Macro IS USM Note: - Slight measurement variations of up to 1 cm may occur due to manual measurement. Please confirm acceptance before ordering. - Screen display settings may cause slight color differences between images and the actual product. Package Includes: - 1 x Lens Tripod Mount Ring Base