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iShoot Metal Lens Collar Tripod Mount Ring Compatible with Sigma 18-35mm f/1.8 DC HSM Art, Lens Support Holder Bracket Bottom is Arca-Swiss Fit Quick Release Plate Dovetail Groove
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Amazon.com : Lens Collar Support Tripod Mount Ring Compatible with Sigma 150-600mm f/5-6.3 DG OS HSM Contemporary TS-71 Lens, Bottom Bracket is ARCA Quick Release Plate for ARCA-Swiss Fit Tripod Ball Head
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