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Sigma 82mm WR Ceramic Protector ultra-thin clear glass lens filter

SIGMA

Sigma 82mm WR Ceramic Protector Ultra Thin Clear Glass Lens Filter

SKU CH-E0KM-8T9NH

An 82 mm protective filter built from Clear Glass Ceramic for high transmittance and exceptional hardness

  • Clear Glass Ceramic material resists scratches and impacts
  • Ultra-thin frame prevents vignetting on wide-angle lenses
  • Water-repellent coating sheds moisture and simplifies cleaning
  • High light transmittance maintains image clarity and colour fidelity
  • Available in 67, 82 and 105 mm thread sizes

Sigma 82mm WR Ceramic Protector

The Sigma WR Ceramic Protector is an 82mm clear glass lens filter built from Clear Glass Ceramic, a crystallised material harder than chemically strengthened glass and more flexible than sapphire crystal glass. It shields the front element of interchangeable lenses without reducing the high transmittance required for optical performance. Photographers who have invested in 82mm filter-thread lenses use it to protect that asset for long-term service.

Clear Glass Ceramic material

The single specification that decides fit is the 82mm filter thread diameter; the filter only mounts on lenses marked with that exact thread size. Clear Glass Ceramic delivers outstanding protective capability through its unique combination of hardness and flexibility, maintaining the optical clarity the manufacturer specifies for photographic expression. No other thread dimension in the 67 to 105mm range will accept this unit.

Ultra-thin filter in a lens system

The ultra-thin profile prevents vignetting when stacked with a lens hood or additional filters, preserving the full field of view on wide-angle designs. It requires a lens with an 82mm front thread and frees the photographer from concerns about front-element scratches, dust or moisture during extended use. Buyers needing a different thread size must select the matching variant from the series.

Highlights

  • Clear Glass Ceramic material resists scratches and impacts
  • Ultra-thin frame prevents vignetting on wide-angle lenses
  • Water-repellent coating sheds moisture and simplifies cleaning
  • High light transmittance maintains image clarity and colour fidelity
  • Available in 67, 82 and 105 mm thread sizes

Specifications

No published specifications for this item yet.

Questions about this item

How does the Clear Glass Ceramic material affect everyday protection for an 82mm lens?

The crystallised glass ceramic is harder than chemically strengthened glass and more flexible than sapphire, giving the 82mm filter strong impact resistance while keeping high optical transmittance.

What thread standard does the 82mm WR Ceramic Protector use, and what does it limit?

It uses a standard 82mm front filter thread, so it fits any lens with that diameter but cannot be mounted on smaller or larger threads without a step ring.

What physical clearance does the ultra-thin frame need to avoid vignetting on wide lenses?

The ultra-thin profile reduces the filter's front depth, helping prevent corner shading on wide-angle lenses that are sensitive to thick filter rings.

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