Condition: Item Type: Lens Mount Ring Material: Metal(Aluminium Alloy) Color: Black Quantity: 1PCS Weight: Approx. 173g Circle Inner Diameter: Approx. 81mm or 3.19inch Circle Width: Approx. 4cm or 1.6inch Suitable Lens: (Compatible Following Lens) For TAMRON SP 70-300mm f or 4-5.6 VC USD(A005) For Sony 70-300mm f or 4.5-5.6G SSM(SAL70300G) For Nikon AF Zoom-Nikkor 80-200mm f or 2.8D ED Instructions for using: 1. An accessory that enhances stability when shooting with a large telephoto lens and using a tripod. Mounted on the lens barrel, the lens is fixed to the tripod through the tripod mount hole below the tripod mount ring. In addition, simply loosen the rotation lock knob of the tripod mount to rotate the camera around the lens, and you can switch between vertical and horizontal composition without tilting the gimbal. Attaching and removing the tripod ring Follow the procedure below to attach the tripod ring and follow the reverse procedure to remove the tripod ring. 2. Turn the lock knob counterclockwise to align the arrows with the dot. Then pull the knob outward to open the ring. 3. With the ring open, place the lens in the tripod ring. Loosen the lock knob of the tripod ring, you can turn the camera and lens mounted on the tripod, freely switch between the horizontal and vertical shooting directions. After turning the camera to the desired position, tighten the lock knob. The tripod ring can be used on the ring tripod head. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.