Protector Filter vs Think Tank Digital Holster 5 V3: which is safer?
Sigma Protector Filter is our pick: better on PFAS and on the overall hazard picture.
Our pick
Sigma
Protector Filter
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleUndisclosed filter media composition
PossibleBacterial growth if maintenance neglected
PossibleCartridge/filter media shedding into water
Think Tank Photo
Think Tank Digital Holster 5 V3
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleUndisclosed water-repellent coating chemistry
PossibleCoating degradation over time
Where these two actually differ
- We flag Undisclosed filter media composition, Bacterial growth if maintenance neglected, Cartridge/filter media shedding into water and PFAS in filter media or housing adhesives on the Sigma and not on the Think Tank Photo.
- We flag Undisclosed water-repellent coating chemistry and Coating degradation over time on the Think Tank Photo and not on the Sigma.
- The Sigma is Unspecified filter media where the Think Tank Photo is Ballistic nylon, weather-sealed fabric, metal hardware, which is most of the difference in these two grades.
- These two are level, close enough that price and fit should decide it rather than our grade.
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 cases: see the full ranking