The Ice 58mm 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 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.

This filter is constructed from optical glass for clarity as well as color fidelity and features an aluminum-alloy filter ring that can be rotated in order to adjust the intensity of the polarization effect. To prevent internal ghosting and reflections, each glass surface includes eight layers of anti-reflection coating. These coatings also offer greater protection to the filter substrate and helps it to stay clean for longer than with uncoated filters.

Circular Polarizer Filter    2x Filter Factor, +1 Stop    Helps to Eliminate Reflections and Glare    Reduces Haze in Landscapes    Greater Color and Tonal Saturation    Multicoated    Optical Glass Construction    Aluminum-Alloy Filter Ring    58mm Front Filter Threads    Plastic Case

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.

2x filter factor reduces exposure by 1 stop.

Multicoated to prevent internal ghosting and reflections.

Aluminum-alloy filter ring for durability while remaining lightweight.

Filter ring can be rotated to adjust the intensity of the polarization effect.

58mm front filter threads allow for use with other filters.

Top knurling to provide a more textured grip when mounting or removing it from a lens.

Constructed from optical glass for clarity and color fidelity.

Plastic filter case for storage and transport.

Related Questions and Answers

Q: 1. I've purchased this but when I rotate it I see no difference in the image. I bought this to remove reflections from windows but they remain just as strong as when I don't have the filter on. Am I doing something wrong?

A: The light needs to be at least partially polarized for a polarizer like this to work. If you are looking straight at the window and trying to remove reflections from behind you will see the least effect. You can experiment by putting yourself and the reflection you want to remove at an angle to the glass and you should start seeing more of an effect. You should find it is quite sensitive to the angle of reflection.

Q: 2. Is Kase KW-MCPL-77 filter compatible with Manfrotto magnetic adapters?

A: It will not fit the Manfrotto magnetic ring but that is okay since the Kase Wolverine Magnetic Circular Polarizer comes with it's own magnetic adapter in the box.

Q: 3. Zeiss or Hoya HD3 CP? They are about equal in price, but which is the better filter for Sony f/2.8 24-70?

A: Both filters have an anti-reflective coating, but the Hoya HD3 would have a 16 layer coating which prevents scratches, stain, and is water resistant, for easier cleaning. Also it has a thinner ring which is better for wider lenses like a Sony 24-70mm f/2.8.

Q: 4. The first photo of this item shows a rectangular filter, but the description says circular. Which shape is it?

A: The Ice 84 x 98mm P Series Circular Polarizer Filter is a rectangular shape but the effect is called circular polarizer.

Q: 5. Is the UV filter included here?

A: No, there is no UV filter included. Just the polarizer.

Q: 6. With only a 1/3 stop loss in light, is this as good at polarization as other polarizing filters with much greater light loss?

A: Yes, it is. This is one of Hoya's highest quality polarizing filters.

Q: 7. What is the thickness of the filter?

A: The Ice Slim Multicoated Circular Polarizer Filter (100 x 100mm) is 0.08" / 2 mm, thick.

Q: 8. Are the rings brass or aluminum? Are there front threads?

A: The rings are aluminum. Brass rings have a tendency to transfer any impact shock directly to the lens, while aluminum rings ill absorb most of the impact.

Q: 9. Is this a better polarizing filter than the B+W 77mm XS-Pro Kaesemann High Transmission Circular Polarizer MRC-Nano Filter at half the price?

A: What you are paying for is quality. Hoya is one of the best companies making filters. With this one you getting all the best features Hoya can produce. The quality of the ring, the glass, the foils that make up the Polarizer, the works. The B+W, on the other hand is the finest they make in this size. Honestly, without comparing side by side, it is hard to make a determination. I suspect both will have outstanding performance and build quality and the in the long run, you will not lose with either.

Q: 10. What is the thickness of this "slim" filter?

A: This filter is 5.2mm thick.