Sigma 100400mm Lens Collar Tripod Mount Ring Aluminum Alloy ArcaSwiss Compatible Quick Release Plate for EF and

Engineered for serious photographers using the Sigma 100-400mm f5-6.3 DG OS HSM Contemporary Lens, this tripod collar mount ring combines precision engineering with practical field-ready features.FAQ:1. Is this compatible with E-mount versions of the Sigma 100-400mm lens? No, this mount ring is designed exclusively for Sigma 100-400mm lenses with EF or F mounts. It is not compatible with E-mount variants.2. Does it include the necessary tool for installation? Yes, a dedicated wrench is included in the package for secure tightening of the collar and safety screws.3. Can I mount it directly to a standard tripod without an Arca-Swiss head? Yes, the base includes both 1/4" and 3/8" threaded holes, allowing direct attachment to any standard tripod or monopod head, even without Arca compatibility. Item Type: Lens Tripod Mount RingMaterial: Aluminum AlloyWeight: Approx. 228g / 8.0ozInterface: 1/4 Inch Screw Hole, 3/8 Inch Screw Hole, for Arca MountApplicable Lens: for Sigma 100-400mm f5-6.3 DG OS HSM Contemporary Lens (for EF Mount, for ) (Note: it can't be used for E Mount)Package List：1 x Lens Tripod Mount Ring1 x Wrench

• PRECISION-CRAFTED ALUMINUM ALLOY CONSTRUCTION: CNC-machined and anodized aluminum alloy body delivers high strength-to-weight ratio, manual polishing ensures smooth finish and long-term durability without adding bulk to your setup.
• ARCA-SWISS COMPATIBLE QUICK RELEASE SYSTEM: Integrated 100mm base plate features standard Arca ports plus 1/4" and 3/8" threaded holes, enabling seamless mounting on ball heads, panoramic heads, and Arca-style clamps for rapid deployment.
• SECURE LENS BALANCING WITH DUAL SAFETY STOP SCREWS: Designed specifically for Sigma 100-400mm f5-6.3 DG OS HSM Contemporary Lens (EF and F mounts), the collar stabilizes heavy telephoto optics on tripods while dual side-mounted stop screws prevent accidental detachment during use.
• LIGHTWEIGHT HOLLOW DESIGN FOR PORTABILITY: Strategically hollowed structure reduces weight to just 228g (8.0oz) without compromising rigidity, making it ideal for wildlife, sports, and travel photography where every ounce matters.
• BUILT-IN STRAP HOLE FOR CONVENIENT CARRYING: Integrated loop allows attachment of a neck or hand strap directly to the collar ring, offering added handling security when transitioning between handheld and tripod-mounted .