K&F Concept · Waterproof Camera & Lens Protection Cases
K&F Concept Nano-X Series MCUV Filter
Glass core is lower concern, coating details missing.
This camera filter's core is optical glass, which naturally avoids PFAS. The brand won't disclose what multi-coat treatments do the UV protection work.
The better-graded swap
Case-Mate
Case Mate Waterproof Floating Pouch
85/100 safety
Same rubric that flunked this product. The swap earned Excellent.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Optical glass with unspecified coatings
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What K&F Concept Nano-X Series MCUV Filter is made of, ingredients and materials
This UV filter consists of optical-grade glass as its primary substrate with multi-layer anti-reflective and UV-blocking coatings applied to the surfaces. The glass itself is inert and poses no leaching risk, but the coating composition is not publicly specified by either K&F Concept or 3M, making it impossible to assess whether it contains metal oxides, rare earth elements, or other compounds that could degrade or leach under prolonged UV exposure, temperature cycling, or moisture. Optical coatings in this class typically use titanium dioxide, silicon dioxide, or rare earth oxides, but without manufacturer disclosure, the specific materials and any potential surface degradation pathways remain unknown.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Unknown / proprietary coating
A coating is recorded with no disclosed chemistry.
Coating leachables and degradation
Multi-layer optical coatings, especially nanotechnology-marketed ones, can contain metal oxides or rare earth elements that may be released into cleaning solutions or onto skin over time if the coating degrades or delaminates. No testing data is available for this specific product.
UV-induced coating breakdown
Unspecified coatings may not be fully stabilized against long-term UV exposure. Breakdown could release airborne or liquid-suspended coating particles. Storage and handling guidelines are absent from product documentation.
Hydrophobic/oleophobic treatment composition
The Nano-X branding suggests water and oil repellent coatings, which historically have used PFAS compounds or other fluorinated polymers. 3M's silence on PFAS in optical products creates ambiguity about whether such treatments are present in this filter variant.
Lack of third-party certification or testing
Neither K&F Concept nor 3M provides ISO 14644 cleanliness certifications, outgassing (VOC) testing, or heavy metal leach testing for this filter. Absence of such data is standard for budget optics but increases uncertainty.
What’s reassuring
Manufacturing process residues
Optical glass coating processes can leave chemical residues (polishing compounds, anti-static treatments) on the surface if not properly rinsed. No recalls or complaints have been documented for K&F filters, but transparency on manufacturing controls is absent.
How is this PFAS grade calculated?
The brand's record and disclosure
3M has a mixed history on material transparency, while they disclose Teflon-type coating use in some products, they remain silent on optical coating compositions across their filter lines. K&F Concept, a smaller Chinese-origin accessory brand, does not maintain public material safety documentation or third-party certifications for their optics. Neither brand provides safety data sheets (SDS) for the filter itself, and 3M's stated 'silent' PFAS stance suggests no proactive disclosure on whether PFAS-based hydrophobic or oleophobic coatings are used in lens treatments. This lack of transparency is a significant red flag for optical coatings, where such treatments are common.
How it compares in its category
UV filters in this price and performance tier typically use similar glass-plus-coating designs; Hoya, B+W, and Tiffen filters from established brands also do not always publicly disclose coating ingredients, but they maintain higher standards for manufacturing documentation and have longer track records of field reliability data. K&F's nano-coated filters are marketed aggressively on cost and hydrophobic properties, which suggests advanced surface treatments that warrant disclosure but do not receive it. The Nano-X branding emphasizes nanotechnology, which in optics often implies engineered thin films that could include materials of concern if not properly bonded and tested for stability.
If you buy it
Store the filter in a dry environment and avoid prolonged direct sunlight when not in use, as UV exposure combined with temperature extremes could accelerate coating degradation. Do not clean with solvents beyond isopropyl alcohol and lens tissue; aggressive cleaners may degrade the nano-coating or release coating particles. Inspect the filter periodically for visible coating wear (cloudiness, iridescence change, or flaking); if the coating begins to fail, discontinue use to avoid coating particles on your lens. Replace every 2-3 years if used frequently in high-UV environments (mountain, tropical, or high-altitude settings) even if appearance seems intact, because coating breakdown may not be visually obvious until significant UV light scatters through degraded layers.
What is not known about PFAS in this product?
- Basis
- Model estimate, 45% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- K&F Concept has made none
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to K&F Concept Nano-X Series MCUV Filter?
- Optical glass lens with multi-coated optical surfaces
- We found no PFAS statement from the brand
- No PFAS statement found from the brand
- Glass lens (borosilicate or soda-lime glass)
- Optical coating degradation
2 hazards checked on this product, all on its full breakdown.
- Optical glass, aluminum frame, non-coated optical surfaces
- We found no PFAS statement from the brand
- Optical glass fragility and sharp edges
More waterproof camera & lens protection cases grades
How we score, every product runs through the same public 0-100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.