FILTER

SIGMA
WR CERAMIC
PROTECTOR

SIGMA offers world’s first*
Clear Glass Ceramic protective lens filters

Give your valued lenses the care they deserve with the true protector.

Interchangeable lenses are the most important element of photographic expression, and to the photographer they are a valuable personal asset. To help photographers continue to use for many years the lens systems in which they have invested their time, knowledge, and budgets, SIGMA has developed original lens filters that meet the company’s high standards of excellence. In developing its new protective lens filter, SIGMA has leveraged an unprecedented cooperative relationship with a glass manufacturer, resulting in a completely new type of glass called Clear Glass Ceramic. Featuring this advanced material, the SIGMA WR CERAMIC PROTECTOR is a highly reliable filter with outstanding protective capability.

With many applications in aerospace and other industries, glass ceramic is an extremely tough type of crystallized glass that serves as the foundation for Clear Glass Ceramic. While featuring the high transmittance required of optical devices, this advanced new material combines greater hardness than chemically strengthened glass and greater flexibility than sapphire crystal glass. These qualities make Clear Glass Ceramic the ideal material for protective lens filters.
*Among filters for interchangeable lenses as of December 2015 (SIGMA research)

Concept Movie

Drop Ball Test Movie

Clear Glass Ceramic
Chemically strengthened glass

Highly shock-resistant
Clear Glass Ceramic

In the chemically strengthened glass used in conventional high-strength protective filters, only the surface is strengthened through chemical processes. In contrast, Clear Glass Ceramic is made with a special heat treatment that precipitates microcrystals of a mineral called spinel evenly throughout, giving the entire filter consistent strength. Combining much greater hardness than chemically strengthened glass and greater flexibility than sapphire crystal glass, Clear Glass Ceramic is the ideal material for protective filters. Clear Glass Ceramic is also resistant to cracking due to small scratches or chips. Since the risk of shattering and producing fragments is reduced, it also offers an enhanced level of safety.

Scratch-resistant

Clear Glass Ceramic
Conventional protective filter

Clear Glass Ceramic offers a Vickers hardness number of 700HV.* This is a level of hardness much higher than that of chemically strengthened glass, which is used in conventional high-strength protective filters. Moreover, this higher level of hardness helps prevent scratches and chips, which can lead to breakage of the filter.

*In the Vickers hardness test, a diamond instrument is pressed onto a material, and the indentation so produced is used to calculate the hardness of the material, which is expressed as a Vickers Pyramid Number (HV).

Thinner and lighter overall, thanks to advanced new material

Since Clear Glass Ceramic is extremely strong, the SIGMA WR CERAMIC PROTECTOR is up to 50 percent thinner and weighs up to 30 percent less than previous SIGMA filters while offering a higher level of strength.

10 times the strength of a conventional protective filter, 3 times the strength of a chemically hardened glass filter

Clear Glass Ceramic
Conventional protective filter

Made with a special process that evenly precipitates microcrystalline spinel throughout the material, Clear Glass Ceramic offers a Vickers hardness number of 700HV. The new SIGMA filter made with Clear Glass Ceramic offers over 10 times the strength of a conventional protective filter and over 3 times the strength of a high-strength protective filter made with chemically hardened glass of the same thickness.

High transmittance

SIGMA’s Clear Glass Ceramic offers very high transmittance, making it ideal for use as optical glass.

Water-repellent (WR) coating

WR Coating
Conventional protective filter

The WR 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: water drops bounce right off, and fingerprints are easily removed with a quick wipe. This coating also offers high lubricating ability, giving it more than ten times the scratch-preventing capability of SIGMA’s current Super Multi-Layer Coating. The coating’s antistatic function helps prevent static electricity from attracting dust and other particles, which can easily be blown off the filter when they do adhere.

High quality and compatibility with all SIGMA lenses

SIGMA has checked the compatibility of all SIGMA filters with all SIGMA lenses. In addition, SIGMA has confirmed that these filters allow light to pass through evenly throughout the image, from the center to the edges. All SIGMA lenses in its new lines are checked with SIGMA’s proprietary Modulation Transfer Function (MTF) measuring system (A1)* using 46-megapixel Foveon direct image sensors, and all SIGMA filters are also manufactured to meet this same exacting standard.
*A1: Aizu1

Use of newly developed advanced material
from glass manufacturer Ohara Inc.

The SIGMA WR CERAMIC PROTECTOR features an advanced new material, the Clear Glass Ceramic, which is made using newly developed crystallized glass from glass manufacturer Ohara Inc.

Case ideal for filter storage

The storage case is made of a special acrylic that is both stronger and more flexible than conventional filter storage case materials. The outer acrylic case is molded so as to be integrated with the inner elastomer holder, creating a filter holder designed to last many years with minimal deterioration. The case is designed to be highly durable and not open or close accidentally during use. All of these individual benefits add up to a case that is ideal for filter storage.

MADE IN JAPAN

All SIGMA filters are made completely in Japan, including all individual processes applied in their manufacture.

SIGMA WR PROTECTOR

Water-repellent, Antistatic type

Protector is developed to protect the lens surface from dirt and dust as well as scratches. It is an ideal filter for regular use as it is completely colorless so does not affect color reproduction.
※WR:Water Repellent

Water-repellent (WR) coating

WR Coating
Conventional protective filter

The WR 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: water drops bounce right off, and fingerprints are easily removed with a quick wipe. This coating also offers high lubricating ability, giving it more than ten times the scratch-preventing capability of SIGMA’s current Super Multi-Layer Coating. The coating’s antistatic function helps prevent static electricity from attracting dust and other particles, which can easily be blown off the filter when they do adhere.

High quality and compatibility with all SIGMA lenses

SIGMA has checked the compatibility of all SIGMA filters with all SIGMA lenses. In addition, SIGMA has confirmed that these filters allow light to pass through evenly throughout the image, from the center to the edges. All SIGMA lenses in its new lines are checked with SIGMA’s proprietary Modulation Transfer Function (MTF) measuring system (A1)* using 46-megapixel Foveon direct image sensors, and all SIGMA filters are also manufactured to meet this same exacting standard.
*A1: Aizu1

Case ideal for filter storage

The storage case is made of a special acrylic that is both stronger and more flexible than conventional filter storage case materials. The outer acrylic case is molded so as to be integrated with the inner elastomer holder, creating a filter holder designed to last many years with minimal deterioration. The case is designed to be highly durable and not open or close accidentally during use. All of these individual benefits add up to a case that is ideal for filter storage.

MADE IN JAPAN

All SIGMA filters are made completely in Japan, including all individual processes applied in their manufacture.

SIGMA PROTECTOR

Normal type

Protector is developed to protect the lens surface from dirt and dust as well as scratches. It is an ideal filter for regular use as it is completely colorless so does not affect color reproduction.

Ultra Low-reflection

By incorporating SIGMA's Super Multi-Layer Coating, the filter reduces flare and ghosting. In addition, black rimmed glass eliminates unnecessary internal reflections, and provides high performance for both digital cameras and film cameras.

High quality and compatibility with all SIGMA lenses

SIGMA has checked the compatibility of all SIGMA filters with all SIGMA lenses. In addition, SIGMA has confirmed that these filters allow light to pass through evenly throughout the image, from the center to the edges. All SIGMA lenses in its new lines are checked with SIGMA’s proprietary Modulation Transfer Function (MTF) measuring system (A1)* using 46-megapixel Foveon direct image sensors, and all SIGMA filters are also manufactured to meet this same exacting standard.
*A1: Aizu1

Case ideal for filter storage

The storage case is made of a special acrylic that is both stronger and more flexible than conventional filter storage case materials. The outer acrylic case is molded so as to be integrated with the inner elastomer holder, creating a filter holder designed to last many years with minimal deterioration. The case is designed to be highly durable and not open or close accidentally during use. All of these individual benefits add up to a case that is ideal for filter storage.

MADE IN JAPAN

All SIGMA filters are made completely in Japan, including all individual processes applied in their manufacture.

SIGMA WR UV FILTER

UV Water-repellent, Antistatic type

UV filter prevents the bluish tone that generates when the weather is fine, by absorbing ultraviolet rays. It is effective in most situations, such as landscape, portrait and general photography on a sunny day. It is also an ideal filter for regular use as it is completely colorless so does not affect color reproduction.
※WR:Water Repellent

Water-repellent (WR) coating

WR Coating
Conventional protective filter

The WR 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: water drops bounce right off, and fingerprints are easily removed with a quick wipe. This coating also offers high lubricating ability, giving it more than ten times the scratch-preventing capability of SIGMA’s current Super Multi-Layer Coating. The coating’s antistatic function helps prevent static electricity from attracting dust and other particles, which can easily be blown off the filter when they do adhere.

High quality and compatibility with all SIGMA lenses

SIGMA has checked the compatibility of all SIGMA filters with all SIGMA lenses. In addition, SIGMA has confirmed that these filters allow light to pass through evenly throughout the image, from the center to the edges. All SIGMA lenses in its new lines are checked with SIGMA’s proprietary Modulation Transfer Function (MTF) measuring system (A1)* using 46-megapixel Foveon direct image sensors, and all SIGMA filters are also manufactured to meet this same exacting standard.
*A1: Aizu1

Case ideal for filter storage

The storage case is made of a special acrylic that is both stronger and more flexible than conventional filter storage case materials. The outer acrylic case is molded so as to be integrated with the inner elastomer holder, creating a filter holder designed to last many years with minimal deterioration. The case is designed to be highly durable and not open or close accidentally during use. All of these individual benefits add up to a case that is ideal for filter storage.

MADE IN JAPAN

All SIGMA filters are made completely in Japan, including all individual processes applied in their manufacture.

SIGMA WR CIRCULAR PL FILTER

PL Water-repellent, Antistatic type

Circular PL filter removes the reflection of water surface and glass windows, and increases the contrast in landscape photography.
※WR:Water Repellent

Water-repellent (WR) coating

WR Coating
Conventional protective filter

The WR 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: water drops bounce right off, and fingerprints are easily removed with a quick wipe. This coating also offers high lubricating ability, giving it more than ten times the scratch-preventing capability of SIGMA’s current Super Multi-Layer Coating. The coating’s antistatic function helps prevent static electricity from attracting dust and other particles, which can easily be blown off the filter when they do adhere.

High quality and compatibility with all SIGMA lenses

SIGMA has checked the compatibility of all SIGMA filters with all SIGMA lenses. In addition, SIGMA has confirmed that these filters allow light to pass through evenly throughout the image, from the center to the edges. All SIGMA lenses in its new lines are checked with SIGMA’s proprietary Modulation Transfer Function (MTF) measuring system (A1)* using 46-megapixel Foveon direct image sensors, and all SIGMA filters are also manufactured to meet this same exacting standard.
*A1: Aizu1

Case ideal for filter storage

The storage case is made of a special acrylic that is both stronger and more flexible than conventional filter storage case materials. The outer acrylic case is molded so as to be integrated with the inner elastomer holder, creating a filter holder designed to last many years with minimal deterioration. The case is designed to be highly durable and not open or close accidentally during use. All of these individual benefits add up to a case that is ideal for filter storage.

MADE IN JAPAN

All SIGMA filters are made completely in Japan, including all individual processes applied in their manufacture.

Barcode

WR CERAMIC
PROTECTOR
WR PROTECTOR PROTECTOR WR UV WR CIRCULAR PL
46mm - 930882 931018 930622 930752
49mm - 930899 931025 930639 930769
52mm - 930905 931032 930646 930776
55mm - 930912 931049 930653 930783
58mm - 930929 931056 930660 930790
62mm - 930936 931063 930677 930806
67mm 931803 930943 931070 930684 930813
72mm 931810 930950 931087 930691 930820
77mm 931827 930967 931094 930707 930837
82mm 931834 930974 931100 930714 930844
86mm 931841 930981 931117 930721 930875
95mm 931858 930998 931124 930738 930851
105mm 931865 931001 931131 930745 930868
* From 46mm to 82mm: Thinner frame wide type. 86mm, 95mm and 105mm:Normal frame type.
* Manufacturer’s code is 0085126