91.20

Sigma WR Ceramic Protector

67 mm, Protection filter

Size

67 mm72 mm 77 mm 82 mm 86 mm 95 mm 105 mm

Interchangeable lenses are the most important elements of photographic expression and are valuable personal equipment for the photographer. SIGMA has developed innovative filters for lens front lenses that meet the company's high quality standards and help photographers use the lenses they have invested a lot of time, experience and money in for years. In developing the new protective filter for objective front lenses, SIGMA used the cooperation with a glass manufacturer for the first time to produce a new type of glass, clear glass ceramics. The SIGMA WR CERAMIC PROTECTOR made of this advanced material is an extremely reliable filter with an outstanding protective function. Glass-ceramic is an extremely resistant, crystallized glass that serves as the basis for clear glass ceramics and is widely used in space travel and other industries. This advanced new material combines greater hardness than chemically hardened glass and greater flexibility than sapphire crystal glass and has the high light transmission required for optical devices. These properties make clear glass ceramics the ideal material for lens protection filters. The chemically hardened glass used for conventional high-strength protective filters is only hardened at the surface by chemical processes. In contrast, clear glass ceramic is manufactured with a special heat treatment that ensures an even filling with the mineral spinel and thus gives the entire filter a continuous hardness. Due to the combination of greater hardness than chemically hardened glass with greater flexibility than sapphire crystal glass, clear glass ceramic is the ideal material for protective filters. Clear glass ceramic is also break-resistant if small scratches or chippings occur. Since the risk of fragmentation into small fragments is reduced, it offers a higher degree of security.

Sigma Switzerland Warranty

Product includes the official SSC card with Sigma Switzerland warranty.

Key specifications
Filter type	screw filter

30-day right of return

Unfortunately, we cannot accept a product if it is damaged, incomplete or missing its original packaging.

Warranty	24 Months Bring-in
Fee-based repair	Available for a fee.

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Sigma WR Ceramic Protector

Size

Description

Important information

Sigma Switzerland Warranty

Specifications

Key specifications

Returns and warranty

30-day right of return

Availability

Price trend