Item Type: Lens Collar Tripod Mount Ring <br>Material: Aluminum Alloy <br>Weight: Approx. 227g / 8.0oz <br>Interface: 1/4 Inch Screw Hole, 3/8 Inch Screw Hole, for Arca Mount <br>Applicable Lenses: for Sigma 100-400mm F5-6.3 DG DN OS (E/L Mount) Lens, for Sigma 105mm F/1.4 DG HSM Art Lens for FE Mount<br>1、Applicable Lenses: Lens collar tripod mount ring is suitable for Sigma 100?400mm F5?6.3 DG DN OS (E/L Mount) Lens, for Sigma 105mm F/1.4 DG HSM Art Lens, for FE Mount. <br>2、Quick Mount Plate: At the bottom of the lens ring is an 80mm quick mount plate with built in for Arca mount, 1/4 inch and 3/8 inch screw holes, compatible with tripod ball heads, panoramic ball heads, and fixtures. <br>3、Installing On A Tripod: The metal lens collar tripod mount ring is installed on a tripod, which can help you fix and balance your telephoto lens. <br>4、Aluminum Alloy Material: Lens collar tripod mount ring is made of aluminum alloy material, accuracy machined, lightweight, and easy to carry. <br>5、Anti Slip Patch: Built in anti slip patch to protect your lens and ensure smoother rotation, providing you great using experience.1 x Lens&nbsp;Collar&nbsp;Tripod&nbsp;Mount&nbsp;Ring