1. The tripod mount ring is tailor-made according to the shape and structure of the lens. The inner wall of the tripod ring has a concave-convex irregular structure, avoiding lens bumps and switches; only compatible with Sony FE 24-70mm F2.8 GM II, FE 16-35mm F2.8 GM II & FE 20-70mm F4 G Lens, Not Compatible with Sony FE 24-70mm F2.8 GM lens; | 2. The tripod collar bottom is added 50mm long Arca fit quick release plate feature, can be used with 39mm Arca-Swiss fit tripod head and clamp directly, more practical than lens collars without QR-Plate; | 3. The quick release plate's bottom is improved with new design, which is compatible with the handheld stabilizer with the same structure of Arca-Swiss; also reserved 1/4" and 3/8" screw holes and stainless-steel anti-slip screws for fixing lens to tripod directly； | 4. The tripod ring is tightly combined with the lens, and there should be no stickers at the installation position. If there is, it should be removed, otherwise it will affect the installation. The inner wall of the tripod ring and the contact surface of the lens are PVC film; | 5. When installing, loosen the knob, align the installation position, and gently push down to lock it. Please do not use excessive force; the tripod ring supports vertical shooting. When shooting vertically, remove the lens and reinstall it, and cannot rotate directly on the lens surface.