Hoya · Waterproof Camera & Lens Protection
Hoya NXT Plus UV Filter
Lower concern, but coating composition unspecified by brand.
Hoya NXT Plus UV filters use optical glass with proprietary UV-absorbing coatings. Brand does not disclose coating chemistry or PFAS status, making full assessment difficult.
The safe swap
Sigma
Sigma WR UV Filter
100/100 safety
Same rubric that flunked this product. The swap earned its A.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Optical glass with UV-absorbing coating
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Unknown / proprietary coating
Proprietary coating with no disclosed chemistry.
Category baseline
other is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
Hoya NXT Plus UV filters are precision optical glass with a UV-absorbing multi-coat treatment applied to the surface. The glass substrate itself is chemically inert and poses no leaching risk under normal use. The coating's exact composition is proprietary, but standard UV-blocking lens coatings typically use metal oxides and resins; without Hoya's disclosure, coating durability and potential degradation byproducts remain unverified by independent sources.
The brand's record and disclosure
Hoya is a major Japanese optical manufacturer with decades of clinical and consumer lens production; they maintain ISO 9001 and ISO 13485 certifications for precision optics. The company does not publicly disclose PFAS use in coatings or manufacturing, nor do they publish material safety data sheets for consumer-level filters. No significant product recalls or safety controversies linked to Hoya optical filters appear in public records.
How it compares in its category
UV filters occupy a niche safety position: they are passive optical components with no active chemistry, unlike sunscreens or water filters. Hoya NXT Plus is a mid-to-premium offering; competitor filters (B+W, Tiffen, Nikon) are similarly opaque in coating composition. Glass-based filters are inherently safer than plastic UV filters, which can leach or degrade with heat and light exposure over years.
If you buy it
Store the filter in a dry case to prevent coating degradation from moisture. Clean only with microfiber cloths and lens solution; avoid alcohol-based cleaners that may damage the anti-reflective coating. Inspect annually for visible coating wear (cloudiness, separation from glass edge); replace if damage is evident. No heat or chemical exposure hazards exist in normal photographic use.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Coating composition opacity
Hoya does not disclose the specific resin or metal oxide components in the NXT Plus UV coating. Without transparency, PFAS presence in the coating binder cannot be ruled out, though standard optical coatings typically avoid PFAS due to manufacturing constraints.
Coating degradation over time
Multi-layer optical coatings can delaminate or show edge separation after 5-10 years of use, especially if exposed to moisture or temperature swings. Degradation byproducts have not been characterized in public literature for this product.
Glass substrate safety
Optical-grade glass is chemically stable and does not leach lead, cadmium, or other heavy metals under normal handling. No glass-related hazards are documented for this product category.
Manufacturing VOCs or residues
Hoya manufactures lenses in controlled facilities with certification; no independent reports of VOC off-gassing or solvent residues on packaged filters exist in consumer safety literature.
Allergic contact dermatitis from handling
Optical glass and standard lens coatings are not sensitizers. No formaldehyde resins, azo dyes, or known allergens are typical in optical coating formulations.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 60% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Waterproof Camera & Lens Protection
Sigma
WR UV Filter
UV-absorbing optical glass or mineral coating
Lower concern optical filter; no known PFAS-prone components identified.
✓Naturally PFAS-free material
GoPro
HB-Series Lens Collection for HERO13 Black
Glass and optical lens elements
Lower concern. Glass lenses pose minimal PFAS risk typically.
⚠Brand says nothing about PFAS
GoPro
K&F Concept 4-in-1 Filter Kit for GoPro HERO9/10/11
Glass optical filters, metal frames, rubber gaskets
Lower concern. Optical glass filters unlikely to contain PFAS.
⚠Brand says nothing about PFAS
More waterproof camera & lens protection 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.