Nano-X Series MCUV Filter vs UV Haze 010 Filter: which is safer?
B+W UV Haze 010 Filter is the clear pick. K&F Concept Nano-X Series MCUV Filter carries a failing PFAS grade, and we never recommend buying a failing product.
K&F Concept
Nano-X Series MCUV Filter
PFAS grade
Good 50/100
Overall grade
Poor 28/100
Verdict
Skip
Hazard flags
⚑ 4
Material
Optical glass with unspecified coatings
Confidence
45%
PossibleCoating leachables and degradation
PossibleUV-induced coating breakdown
PossibleHydrophobic/oleophobic treatment composition
Our pick
B+W
UV Haze 010 Filter
PFAS grade
Excellent 85/100
Overall grade
Excellent 85/100
Verdict
Buy
Hazard flags
none flagged
Material
Optical glass lens with multi-coated optical surfaces
Confidence
82%
Where these two actually differ
- We flag Coating leachables and degradation, UV-induced coating breakdown, Hydrophobic/oleophobic treatment composition and Lack of third-party certification or testing on the K&F Concept and not on the B+W.
- The K&F Concept is Optical glass with unspecified coatings where the B+W is Optical glass lens with multi-coated optical surfaces, which is most of the difference in these two grades.
- The gap is 35 points, wide enough that this is not a close call, and the B+W is the one to buy.
- We are less certain about the K&F Concept grade, at 45% confidence against 82%, because it discloses less.
Both products run through the same public rubric, which covers materials, coatings, brand disclosure, lab findings, and recalls, plus a beyond-PFAS hazard analysis. Grades are model-based estimates, not lab tests. How grades work →
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