Sigma WR Protector Filter vs WR UV Filter: which is safer?
Sigma WR UV Filter is our pick: better on PFAS and on the overall hazard picture.
3M
Sigma WR Protector Filter
PFAS grade
B 85/100
Overall grade
C 73/100
Verdict
Buy
Hazard flags
⚑ 3
Material
Fiberglass filter media with cellulose
Confidence
72%
PossibleFiberglass fiber shedding
PossibleMicrobial biofilm growth in housing
PossibleBacterial colonization if unused
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