WR CPL Circular Polarizer Filter vs WR UV Filter: which is safer?
Sigma WR UV Filter is the clear pick. Sigma WR CPL Circular Polarizer Filter carries a failing PFAS grade, and we never recommend buying a failing product.
Sigma
WR CPL Circular Polarizer Filter
PFAS grade
F 50/100
Overall grade
F 46/100
Verdict
Skip
Hazard flags
⚑ 1
Material
Optical glass, aluminum frame, likely multi-coated lens elements
Confidence
72%
PossibleGlass breakage and sharp edges
Our pick
Sigma
WR UV Filter
PFAS grade
A 100/100
Overall grade
A 96/100
Verdict
Buy
Hazard flags
⚑ 1
Material
UV-absorbing optical glass or mineral coating
Confidence
72%
PossibleOptical coating degradation and microabrasion
Both products run through the same public rubric: 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 →
More waterproof camera & lens protection: see the full ranking