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Amazon.com : K&F Concept 43mm Variable ND Filter ND2-ND32 Camera Lens Filter (1-5 Stops) No X Cross HD Neutral Density Filter with 28 Multi-Layer Coatings Waterproof (Nano-X Series) : Electronics
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Amazon.com : K&F Concept 82mm Variable ND Filter ND2-ND32 Camera Lens Filter (1-5 Stops) No X Cross HD Neutral Density Filter with 28 Multi-Layer Coatings Waterproof (Nano-X Series) : Electronics
K&F Concept 77mm ND2-ND400 (9 Stop) Variable Neutral Density Filter Multi Coated | eBay
K&F Concept Nano-X ND2-ND32 Green Multicoated Variable KF01.1375