- Designed specifically for the Canon RF 100-400mm F5.6-8 IS USM Lens, this lens tripod mount ring enhances stability and balance when mounted on a tripod, ensuring optimal support for your heavy lens and reducing strain on your camera body. - The inner cushion is crafted from soft material to protect your lens from scratches while maintaining a secure fit. Made from solid aluminum, this mount ring is both durable and lightweight, ideal for long photography sessions. - Features a versatile mounting system with a built-in 70mm long Arca Swiss plate, as well as 1/4"-20 and 3/8"-16 holes on the base. This allows for quick and easy attachment to tripods, ball heads, clamps, or panorama heads. - Quick and user-friendly attachment process: simply unlock or lock the large thumb knob to secure or release the lens. Ensure proper alignment of the dots before locking, and avoid rotating the lens or collar ring after securing. Use Scenarios: 1. Perfect for wildlife photographers who require stable support for long periods while capturing fast-moving subjects with their Canon RF 100-400mm lens. 2. Ideal for landscape photography, where maintaining stability on uneven terrain is crucial for sharp images. 3. Great for videographers needing to balance their equipment for smooth panning and tracking shots. This lens tripod mount ring is a practical solution for photographers seeking stability, ease of use, and protection for their valuable equipment.