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The Sigma 105mm WR Circular Polarizer Filter helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface. The light from the sun naturally becomes partially polarized due to reflecting off electrons in air molecules, causing the light to scatter into what appears as haze. A polarizing filter arranges, and filters this directionally polarized light perpendicularly to the reflected light, allowing for the absorption of much of this light. This results in a noticeable reduction of glare and reflections from non-metallic surfaces and an increase in the saturation of skies and foliage. A general increase in contrast becomes visible as well.
A circular polarizer only differs from a linear polarizer in that it contains a quarter wave plane in addition to the linear polarizing filter. The addition of this quarter wave plane is to circularly polarize the linearly polarized light for the use of auto focus and exposure functions. Due to how the light is broken down and filtered with a linear polarizer, auto focus and exposure metering accuracy become skewed during use. When the light becomes circularly polarized, it permits the use of these functions.
This Sigma WR Circular Polarizer Filter is coated to repel water drops and resist smudging from fingerprints. It is also treated to exhibit antistatic properties to prevent microscopic dust from clinging to the front surface. This helps to ensure sharp images.
Helps to Eliminate Reflections and Glare
Increases Contrast
Reduces Haze in Landscapes
Greater Color and Tonal Saturation
Water, Oil, and Static Repellant
The Sigma 105mm WR Circular Polarizer Filter helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface. The light from the sun naturally becomes partially polarized due to reflecting off electrons in air molecules, causing the light to scatter into what appears as haze. A polarizing filter arranges, and filters this directionally polarized light perpendicularly to the reflected light, allowing for the absorption of much of this light. This results in a noticeable reduction of glare and reflections from non-metallic surfaces and an increase in the saturation of skies and foliage. A general increase in contrast becomes visible as well.
A circular polarizer only differs from a linear polarizer in that it contains a quarter wave plane in addition to the linear polarizing filter. The addition of this quarter wave plane is to circularly polarize the linearly polarized light for the use of auto focus and exposure functions. Due to how the light is broken down and filtered with a linear polarizer, auto focus and exposure metering accuracy become skewed during use. When the light becomes circularly polarized, it permits the use of these functions.
This Sigma WR Circular Polarizer Filter is coated to repel water drops and resist smudging from fingerprints. It is also treated to exhibit antistatic properties to prevent microscopic dust from clinging to the front surface. This helps to ensure sharp images.
Name | Value |
---|---|
Brand | Sigma |
Filter Type | Circular Polarizer |
Filter Type | Circular Polarizer |
Filter Factor | 1.25 - 1.4 (0.3 - 0.5 Stop) |
Filter Factor | 2 - 8 (1 - 3 Stop) |
Shape | Circle |
Shape | Circle |
Circular Size | 105 mm |
Circular Size | 105 mm |
Front Thread / Bayonet | 105 mm |
Front Thread / Bayonet | 105 mm |
Filter Material | Glass |
Coatings | None |
Sigma 105mm WR Circular Polarizer Filter