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Wyatt Aluminum 150mm Square Filter Holder Support Bracket for Sigma 14mm F1.8 DG HSM Art Lens for Lee Hitech 150 series Filter|square filter holder| filter holdersquare filter - AliExpress
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Amazon.com : SIOTI 100mm Square Z Series Aluminum Modular Filter Holder + 67mm-72mm Aluminum Adapter Ring for Lee Hitech Singh-Ray Cokin Z PRO 4X4 4x5 4X5.65 Filter(67mm) : Electronics
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Amazon.com : SIOTI 100mm Square Z Series Aluminum Modular Filter Holder + 77mm-82mm Aluminum Adapter Ring for Lee Hitech Singh-Ray Cokin Z PRO 4X4 4x5 4X5.65 Filter(77mm) : Electronics
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