Description: The tripod mount ring mount on the tripod, it helps you fix and balance your tele lens which is heavy or long lens hanging off the front of camera. Upgraded base plate is designed with four 1/4" & one 3/8" thread holes, compatible with Arca-Swiss standard dovetail plate. Right weight and strong building by third party. 100% fits Sigma and does have same construction. Specifications: Made by metal with very high quality The UNC (Unified National Coarse Thread) : 1/4" & 3/8" Ring inside diameter: 71mm Ring thickness: 4.5mm Baseplate Length: 60mm Baseplate Width: 38mm Color: black Weight: 131g Suitable For: SIGMA APO 70-200mm F2.8 II EX DG MACRO HSM Lens? Package Includes: 1 x Lens Tripod Mount Ring

Material & Dimension: Made of high quality metal; ring diameter: 71mm, ring thickness: 4.5mm, width is about 18mm. Upgraded base plate is designed with four 1/4" & one 3/8" thread holes, compatible with Arca-Swiss standard dovetail plate. Only 131g, lightweight and strong built by third party. Function: The tripod mount ring mount on the tripod, it helps you fix and balance your tele lens which is heavy or long lens hanging off the front of camera. Compatibility: This tripod mount ring is suitable for SIGMA APO 70-200mm F2.8 II EX DG MACRO HSM.

Manufacturer: Runshuangyu. Date First Available: July 22, 2019. Best Sellers Rank: #103 in Tripod Lens Mount Rings. Customer Reviews: 4.8 out of 5 stars 8 ratings 4.8 out of 5 stars. Item model number: RLAF237_us. : B07VGCKQZS. Item Weight: 5.6 ounces. Package Dimensions: 5.71 x 5.16 x 2.24 inches.