Features 1、Suitable for Sony FE 135mm F1.8 GM lens. 2、Adopt high‑density aviation aluminum, automatic numerical control machine tool, adamas combination cutter heads, hollow carving precision processing; adopt vibration polishing technology, which improves the precision of manual grinding by 20%, and anodizes many times, the color uniformity of the metal surface is increased by 10%. 3、Positioning by the switch and mount. Cannot be rotated. Mount ring round edges and corners to prevent wear. The inner diameter is about 62.5mm. 4、Plate length is about 55mm, with 1/4'' and 3/8'' screw holes and stainless steel anti-slip screw. 5、For Arca-Swiss dovetail at bottom, compatible for Arca Swiss/RRS/kirk/Wimberley/Markins/Sunwayfoto/Benro/Suri/Fotopro... brands with AS stardard. 6、Made of aviation aluminum, CNC precision machining, hollow weight reduction design, polishing and surface anodizing. 7、Suitable for Tamron 17‑28mm F2.8 Di III RXD A046 (E‑mount), for Tamron 28‑75mm F2.8 Di III RXD A036 (E‑mount), for Tamron 28‑200mm F2.8‑5.6 Di III RXD A071 ( E‑mount), for Tamron 70‑180mm F2.8 Di III VXD A056 (E‑mount), for Sigma 14mm F1.8 DG HSM Art (E‑mount), for Sigma 20mm F1.4 DG HSM Art (E‑mount), for Sigma 24mm F1.4 DG HSM Art (E‑mount), for Sigma 28mm F1.4 DG HSM Art (E‑mount), for Sigma 35mm F1.4 DG HSM Art (E‑mount), for Sigma 50mm F1.4 DG HSM Art (E‑mount), for Sony E 16‑55mm F2.8 G, for Sony E 70‑350mm F4.5‑6.3 G OSS, for Sony FE 135mm F1.8 GM. Specification Item type: Lens Tripod Mount Ring Condition: 100% brand new Material: aluminium alloy Weight: Approx. 205g Color: As picture shown Inner diameter: Approx. 62.5mm/2.5in Plate length: Approx. 55mm/2.2in IS-S135FE (compatible for Sony FE fixed lens) Applicable: For Tamron 17-28mm F2.8 Di III RXD A046（E-mount） For Tamron 28-75mm F2.8 Di III RXD A036（E-mount） For Tamron 28-200mm F2.8-5.6 Di III RXD A071（E-mount） For Tamron 70-180mm F2.8 Di III VXD A056（E-mount） For Sigma 14mm F1.8 DG HSM Art（E-mount） For Sigma 20mm F1.4 DG HSM Art（E-mount） For Sigma 24mm F1.4 DG HSM Art（E-mount） For Sigma 28mm F1.4 DG HSM Art（E-mount） For Sigma 35mm F1.4 DG HSM Art（E-mount） For Sigma 50mm F1.4 DG HSM Art（E-mount） For Sony E 16-55mm F2.8 G For Sony E 70-350mm F4.5-6.3 G OSS For Sony FE 135mm F1.8 GM Package List 1 x Lens Tripod Mount Ring 1 x Inner hex wrench