Lensmate Quick-Change Filter Adapter Kit for Sony RX100 II/RX100-52mm - Newegg.com
Sony RX100 VA (also fits V, IV, III, II &1) Quick Change Filter Adapte – Lensmate : Specialty Digital Photo Products
Sony Cyber-shot DSC-RX100 II Review: Digital Photography Review
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Lens / Filter Adapter Ring 52mm For Sony DSC-RX100 RX100 II III IV V Metal 814733011208 | eBay
MagFilter 42mm CPL (Circular Polarizer) Filter for Sony RX100/II/III H – Roxsen.com
Amazon.com : Lensmate Quick-Change Filter Adapter Kit for Sony RX100 VA (Also fits RX100 V & IV) - 52mm : Electronics
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Amazon.com : Lensmate Quick-Change Filter Adapter Kit for Sony RX100 VII or RX100 VI + Hoya 52mm 3-Piece Digital Filter Kit with Case : Electronics
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Sony RX100 Mark II (M2) Review - evolution in times of revolution - EOSHD.com - Filmmaking Gear and Camera Reviews
52mm Filter Adapter Ring for Sony DSC-RX100 RX100II RX100III RX100 IV RX100 V VA 6950291571199 | eBay