Lens Collar Tripod Mount Ring Compatible with Nikon Nikkor Z 70-180mm F2.8, Z 24-200mm f/4-6.3 VR, Z DX 50-250mm f/4.5-6.3 VR (Z-Mount), Support Bracket Holder is Arca-Swiss Fit Quick Release Plate1. The tripod mount ring is tailor made to the shape and structure of the lens. The inner wall of the tripod ring has a concave and convex irregular structure to avoid the lens bumps and switches; 2. The lens collar is only compatible with Nikon Nikkor Z Mount 24 200mm f 4 6. 3 VR and Nikon Nikkor Z Mount DX 50 250mm f 4. 5 6. 3 VR, and Nikon Nikkor Z 70 180mm F2. 8 lens, can't be used for other lenses 3. When installing, loosen the knob, align the