82mm ND2-ND32 (1-5 Stop) Variable ND Filter and CPL Circular Polarizing Filter 2 in 1 for Camera Lens No X Spot Weather Sealed

SKU: KF01.1088

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Alternatively, you can buy neoprene slip on lens covers too. I ran I to the same issue when I bought my VNDF and opted for the neoprene covers instead of plastic lens caps. They work great, just a suggestion.