• 1. This ring tripod is specially designed for Sony FE 135mm f/1.8 GM, Sigma 14mm f/1.8 DG HSM Art, 20mm f/1.4 DG HSM Art, 24mm f/1.4 DG HSM Art, 28mm f/1.4 DG HSM Art, 35mm f/1.4 DG HSM Art, 35mm f/1.2 Also compatible with DG DN Art, 50mm f/1.4 DG HSM Art (E-mount) lens • 2. Lens support adopts hollow light design, stainless steel screws, net weight is about 150g. Switch and Bayonet Positioning Non-rotatable All corners of the lens color are rounded and there is 3M film inside to protect the lens from scratches • 3. The bottom of the lens bracket quick release plate is about 55mm in length, which adopts ARCA-SWISS/RRS standard fit, can be used directly with 39mm Arca-Swiss fit tripod ball head, panorama head and clamp. More practical than a grooved lens color foot • 4. The bottom of the lens support is reserved for 1/4" and 3/8" screw holes and stainless steel non-slip screws to secure the lens directly to the tripod • 5. This lens support collar is made of high quality aviation aluminum, lightweight and durable; Precision milled by world class high-end CNC turning center, surface polishing and anodizing; appearance and exquisite workmanship is much better than similar products made with molds