- AS Standard bottom with an 80mm/3.1in quick-release plate and Arca-compatible interface, compatible with Arca clamps, tripod ball heads, and panoramic heads for fast, secure mounting. - Compatible Lens: designed for RF100-500mm F4.5-7.1 L IS USM; helps balance the camera and lens on a tripod, secures heavy lenses, and reduces the load on the camera body. - Bottom mount: pre-drilled with 1/4in and 3/8in threaded holes to attach to a tripod, aiding secure mounting and balance for heavy telephoto lenses or lenses hanging from the front of the camera. - Installation advice: includes a plastic composite film that will not wear down the lens when properly installed. Do not have stickers on the lens mounting position; remove any if present, or installation may be affected. It can rotate freely like the original tripod ring after installation. - Use scenario 1: wildlife or bird photography with the RF100-500 on a tripod, where balanced setup improves stability and reduces fatigue on the camera. - Use scenario 2: outdoor sports or event shooting with a long telephoto lens, where better weight distribution enhances tracking and reduces camera shake. - Use scenario 3: travel or field work requiring secure front-mounted lenses, providing stable support and easier handling without stressing the camera body.