Ceramic filter? Yes, says Sigma

sigma ceramic filterFor many, if not most, of us, the word ‘ceramic’ conjures up visions of pots, plates and tiles. Sigma has other ideas, notably the Sigma Water Repellent (WR) Ceramic Protector, a lens filter that features new Clear Glass Ceramic material and provides enhanced protective qualities.

While the company has announced the product, it has given no information on either availability or pricing.

This shock- and scratch-resistant Clear Glass Ceramic was developed specifically for Sigma in partnership with a glass manufacturer. Made with a special heat treatment that evenly precipitates microcrystalline spinel throughout the materials, the Clear Glass Ceramic is apparently 10 times stronger than a conventional protective filter and three times the strength of a chemically strengthened filter.

The lens protector also contains WR coating, which repels water, dust and oil, and allows fingerprints to be easily removed.

This enhanced protection helps to preserve the lens and ensure long-term, top-notch image quality.

Key features of the Ceramic Protector:

  • Scratch-resistant – Much stronger than chemically strengthened glass and 10 times stronger than conventional filters
  • Thinner and lighter – Up to 50 percent thinner and up to 30 percent lighter than previous Sigma filters
  • High transmittance
  • Water- and oil-repellent coating – The coating reflects only 0.24 percent of visible light, thereby minimizing flare and ghosting. Its ability to repel both water and oil is also excellent, with water drops bouncing right off, and fingerprints easily removed.

Sigma says this filter will be offered in the most popular filter thread sizes – for front filter threads that are 67 to 105 mm.

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