Aluminum Alloy Lens Collar Tripod Mount Ring for Sigma 100‑400mm Lenses Elevate your photography with the Lens Collar Tripod Mount Ring, designed to provide superior stability and handling for your Sigma 100‑400mm f5‑6.3 DG OS HSM Contemporary Lens. This precision-crafted accessory ensures your lens is securely balanced, making it an essential tool for photographers seeking reliability and performance. Applicable Lens: This lens collar tripod mount ring is specifically designed for use with the Sigma 100‑400mm f5‑6.3 DG OS HSM Contemporary Lens, compatible with both EF Mount and Nikon F Mount. Please note, it is not suitable for E Mount lenses. Quick Mount Plate: The base of this lens ring is equipped with a 100mm quick mount plate featuring built-in Arca ports, along with 1/4 inch and 3/8 inch screw holes. This design allows for easy compatibility with various tripod ball heads, panoramic ball heads, and clamps, providing flexible mounting options to suit your shooting needs. Lens Mount and Safety Stop Screws: The lens mount is designed to be installed securely on a tripod, helping to fix and balance your lens effectively. It includes two safety stop screws on either side of the bottom to prevent accidental falls, ensuring your equipment remains safe and stable during use. Aluminum Alloy Material: Crafted from high-quality aluminum alloy, this lens collar undergoes CNC precise machining, manual polishing, and surface anodizing treatment. These processes contribute to its exceptional durability and sleek, professional appearance, making it a reliable accessory for long-term use. Hollow Design and Strap Hole: Featuring a hollow design, this lightweight lens collar is easy to carry, with a built-in strap hole for added convenience. Its portability makes it perfect for photographers on the move, whether you're working in the studio or out in the field. Specifications: Item Type: Lens Tripod Mount Ring Material: Aluminum Alloy Weight: Approx. 228g / 8.0oz Interface: 1/4 Inch Screw Hole, 3/8 Inch Screw Hole, for Arca Mount Applicable Lens: Sigma 100-400mm f5-6.3 DG OS HSM Contemporary Lens (EF Mount, Nikon F Mount) Enhance your shooting capabilities with the Lens Collar Tripod Mount Ring, designed to deliver stability and ease of use for your Sigma lenses. Order now and experience the difference in your photography!