Photo 1 of 82mm Tripod Mount Ring Lens Collar Compatible with Sigma 105mm f/1.4 DG HSM Art & 100-400mm f/5-6.3 DG DN OS, Lens Support Holder Bracket Bottom is Arca-Swiss Fit Quick Release Plate Dovetail Groove

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Photo 1 of 82mm Tripod Mount Ring Lens Collar Compatible with Sigma 105mm f/1.4 DG HSM Art & 100-400mm f/5-6.3 DG DN OS, Lens Support Holder Bracket Bottom is Arca-Swiss Fit Quick Release Plate Dovetail GroovePhoto 2 of 82mm Tripod Mount Ring Lens Collar Compatible with Sigma 105mm f/1.4 DG HSM Art & 100-400mm f/5-6.3 DG DN OS, Lens Support Holder Bracket Bottom is Arca-Swiss Fit Quick Release Plate Dovetail Groove