1. The lens collar is tailor-made according to the shape and structure of the lens, there are grooves on the inner wall of the tripod ring, corresponding to the raised switches on the surface of the lens, only compatible with Nikon Nikkor Z 24-120mm F4 S Lens, Can not be used for other lenses; | 2. The contact surface between the inner wall of the tripod ring and the lens is made of PVC film; there should be no stickers at the installation position, if there is, it should be removed, otherwise it will affect the installation; | 3. When installing, loosen the knob, align the installation position, push down gently, and lock it moderately; after installation, do not disassemble frequently, which will easily cause wear; | 4. the tripod ring supports vertical shooting. When vertical shooting is required, please withdraw from the lens, adjust the angle and reinstall it. It cannot be rotated directly on the lens surface; | 5. The tripod collar bottom is added 50mm long 39mm Arca fit quick release plate feature, can be used with 39mm Arca-swiss fit tripod ball head, panoramic head and clamp directly; more practical than lens collars without QR-Plate; also reserved 1/4" and 3/8" screw holes and stainless-steel anti-slip screws for fixing lens to tripod directly；