DJI Osmo Action 4 CPL Filter Circular Polarizers, Light Reduction Exposure Control Optical Glass Filters with Multi-Layer Coating

SKU: KF01.2438

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Hi,what we mean by waterproofing is that the surface of the lens is coated with waterproof substances, making it easier to clean the lens without condensation or residue. Instead of having waterproof functions like a waterproof shell.  
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Hi,what we mean by waterproofing is that the surface of the lens is coated with waterproof substances, making it easier to clean the lens without condensation or residue. Instead of having waterproof functions like a waterproof shell. 
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Yes, this CPL filter is nano-coated and waterproof. 
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No, this CPL filter is compatible with only the DJI Osmo Action 4.