Features: 1.The feature of Arca-compatible dovetail allows for the connection of your lens to a ball head, clamp, or panorama head that complies with the Arca-Swiss standard. 2.The base is outfitted with a variety of 1/4-20in and 3/8-16in screw holes, enabling the lens to be directly attached to a tripod. 3.This lens bracket is specifically designed to accommodate the SIGMA 100-400mm/ 105mm F1.4DG HSM lens, guaranteeing a flawless fit and smooth integration with your lens. 4.The tripod mount ring offers a stable and balanced base for your telephoto lens, proving particularly beneficial for heavy lenses or when the telephoto lens is protruding from the camera, aiding in the stabilization and balance of your equipment for ideal shooting. 5.Constructed from aluminum alloy, this lens bracket is meticulously crafted through CNC machining for enhanced durability and dependability. It also includes an internal anti-slip pad to safeguard your lens from scratches and damage, ensuring your equipment remains in pristine condition. Specifications: Brand: JLwin Material: Aluminum Alloy Diameter: 82mm Compatible Model: SIGMA 100-400mm F5-6.3 DG DN OS(E/L); SIGMA 105mm F1.4 DG HSM Dimension: 119 * 80 * 82mm/ 4.68 * 3.15 * 3.2in Weight: 163g Packing List: 1 * Tripod Mount Ring