Vu Filters 40.5mm Sion Slim Circular Polarizer Filter

Vu Filters 40.5mm Sion Slim Circular Polarizer Filter

Vu Filters 40.5mm Sion Slim Circular Polarizer Filter

B&H # VUVSCPOL40 MFR # VSCPOL40
Vu Filters 40.5mm Sion Slim Circular Polarizer Filter

Vu Filters 40.5mm Sion Slim Circular Polarizer Filter Case

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Product Highlights

  • Circular Polarizer Filter
  • 2 to 2.8x Filter Factor, 1 to 1.5 Stops
  • Helps to Eliminate Reflections and Glare
  • Reduces Haze in Landscapes
  • Greater Color and Tonal Saturation
  • Multi-Coated, Flat Wave Overcoat
  • Black Rimmed, Schott Glass Construction
  • Slim, 3.4mm-Thick Filter Ring
  • 40.5mm Front Filter Threads
  • Knurled Sides, Plastic Case
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  • 1Description

The 40.5mm Sion Slim Circular Polarizer Filter from Vu Filters 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 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 accuracy become skewed during use. When the light becomes circularly polarized, it permits the use of these functions.

Sion Slim circular polarizer filters are multi-coated, have approximately a greater than 85% average light transmission, and are constructed from Schott glass with a black rim. Set within aluminum-alloy filter rings that are durable while remaining lightweight, the glass elements provide increased clarity as well as color fidelity, while their black rims further ensure that reflections do not occur along the filter's edge. The Flat Wave Overcoat associated with this Sion Slim circular polarizer filter provides an additional layer over the multi-coatings, resulting in an improved beading effect to repel water for greater cleaning efficiency.

This 40.5mm Sion Slim Circular Polarizer Filter's ring assembly is 3.4mm thick, to help maximize vignetting prevention. It can be rotated in order to adjust the intensity of the polarization effect, and features side knurling to provide a more textured grip for mounting or removing the filter from a lens.

Helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface.
Polarizing filters arrange, and filter, directionally polarized light perpendicularly to the reflected light, allowing for the absorption of much of the light.
Clears up haze in distant landscapes and provides more saturated, vivid colors.
Strongest effect when used at a 90° angle from the sun.
Circular polarizers are ideal for use with digital cameras and autofocus lenses where a linear polarizer will often disrupt auto exposure and focus features.
Multi-coated to prevent internal ghosting and reflections as well as to ensure color fidelity.
Flat Wave Overcoat repels water with an improved beading effect for more efficient cleaning.
Greater than 85% average light transmission.
2 to 2.8x filter factor reduces exposure by 1 to 1.5 stops.
Constructed from Schott glass for optical clarity.
Black rimmed glass further ensures that reflections do not occur along the filter's edge.
Slim, 3.4mm-thick, aluminum-alloy filter ring assembly helps to maximize vignetting prevention, while remaining lightweight.
Filter ring assembly can be rotated to adjust the intensity of the polarization effect.
Side knurling to provide a more textured grip when mounting or removing it from a lens.
40.5mm front filter threads allow for use with other filters.
Plastic filter case for storage and transport.
In the Box
Vu Filters 40.5mm Sion Slim Circular Polarizer Filter
  • Filter Case
  • Limited 5-Year Warranty
  • Table of Contents
    • 1Description
    Filter Type Circular Polarizer
    Filter Factor 2 - 2.8 (1 - 1.5 Stop)
    Shape Circle
    Circular Size 40.5 mm
    Rotating Yes
    Front Accessory Thread / Bayonet 40.5 mm
    Filter Thickness 0.13" / 3.4 mm
    Physical Feature Slim
    Filter Material Glass
    Coatings Multi-Coating
    Packaging Info
    Package Weight 0.1 lb
    Box Dimensions (LxWxH) 3.386 x 3.386 x 0.551"
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