1.1. The lens collar is designed based on the shape and structure of the lens. The inner wall of the tripod ring has grooves that align with the raised switches on the lens surface, ensuring compatibility only with the Nikon Nikkor Z 24120mm F4 S lens and cannot be used with other lenses. 2.2. The contact surface between the inner wall of the tripod ring and the lens is made of PVC film. Make sure there are no stickers at the installation position; if there are, remove them to avoid affecting proper installation. 3.3. During installation, loosen the knob, align the mounting position, gently press down, and lock it moderately. Avoid frequent disassembly after installation as this may cause wear. 4.4. The tripod ring supports vertical shooting. For vertical shooting, pull back from the lens, adjust the angle, and reinstall it. Do not rotate it directly on the lens surface.