The Tiffen 3x4 Inch Linear Polarizer Filterhelps 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 linear polarizer differs from a circular polarizer in that it does not contain an additional quarter wave plane. The addition of a quarter wave plane is to circularly polarize 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, in-camera 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 recommended when not using in-camera exposure metering or autofocus. It is non-coated and delivers approximately 40% average light transmission.

Tiffen filters are made using ColorCore technology; a process that involves laminating the filter substrate between 2 pieces of optical glass and grinding flat to a tolerance of 1/10,000th of an inch.

Linear Polarizer Filter    2.5x Filter Factor, +1.3 Stops    Helps to Eliminate Reflections and Glare    Reduces Haze in Landscapes    Greater Color and Tonal Saturation    Non-Coated    ColorCore Technology    Filter Pouch

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.

Recommended when not using in-camera exposure metering or autofocus.

Non-coated.

Approximately 40% average light transmission.

2.5x filter factor reduces exposure by 1.3 stops.

Constructed using ColorCore technology.

Filter Pouch for storage and transport.

Related Questions and Answers

Q: 1. What is the size of this filter?

A: Series 9 filters by Tiffen are a unique filter system once popular with older lens and camera design. Requiring a Series 9 adapter ring, this system allows you to use one standard size filter (Series 9) on many lens sizes. Series 9 filters, although screw-on style, require a bit more work to set up. The glass filter drops into the adapter ring and is held securely in place with the included retaining ring (adapter ring sold separately). Series 9 filters have no threads. Although these filters are no longer as popular as they used to be, they allow the use of filters for harder to fit lenses, a common problem with older camera lenses.

Q: 2. What does turning the filter do? How can the effects be seen if it is used on a twin-lens camera?

A: Spinning the front of the Hoya 43mm Linear Polarizer Filter effects the level and angle of polarization. The only way to see the effect is to look through the lens that the filter is used on.

Q: 3. Can I use this filter on a Lee filter system holder?

A: There are two industry standard nominal filter thicknesses: 2 mm and 4 mm. The Lee holder, while normally set up for 2 mm, can, with the addition of longer screws, can accommodate 4 mm filters as well.

Q: 4. Will this filter have a negative impact on autofocus in a mirrorless camera like the R5?

A: Linear polarizers usually have autofocus issues with DSLRs not mirrorless, so you shouldn't have a problem with the R5.

Q: 5. What is the differences between this model and http://www.bhphotovideo.com/c/product/398871-REG/Schneider_68013038_138_mm_True_Linear_Polarizing.htmlIt seems like its just different descriptions but the same product. The only noticeable difference is a 10 year warranty on the more expensive model. What exactly does this cover? Does it cover it breaking?

A: Basically, there are two types of Polarizing filters; Linear and Circular. Linear are used for manual focusing as they can confuse AF sensors. Circular filters are designed for AF lenses and cameras but can be used on manual focus cameras as well. For more details on the two, please see: http://bhpho.to/MF21zoThe Schneider 138mm True-Linear Polarizing Glass filter is optimized for motion picture and television cameras. Having an extinction ratio of ER 374, the Schneider True-Pol is 12-times more effective than other polarizing filters. The 138mm Circular Ultra Polarizing Filter from Tiffen is a similar filter yielding a more intense look to your images and is designed for AF cameras. Because of manufacturing differences, circular polarizing filters cost more than comparable linear filters. Both filters come with ten year warranties that cover manufacturing or workmanship defects.

Q: 6. What is the difference between Ultra Pol Circular vs Ultra pol LINEAR? Which one will work best in my matte Shape-2 4x4 case and with my Sony A7SII?

A: Circular Polarizers are designed for use with auto or manual focus lenses, while linear polarizers are best used with manual focus lenses.

Q: 7. The description on this CPL makes a point of specifying that its non-coated . Is that supposed to be a good thing? Aren't multi-coated filters better at controlling reflections than non-coated filters? Since this filter is clearly aimed at professionals and considering its price, shouldn't it be coated?

A: We have been manufacturing these filters for many years for use on motion pictures and TV shows with no issues. Multi-coating helps on round screw in photos for still photography and thinner MPTV filters, however our filters are 4mm thick which helps to prevent reflections. This filter is also made of the highest quality Water White glass. In addition, most of the time these filters are being inserted in a matte box, which also helps to prevent reflections. Tiffen has won two Academy Awards and Two Emmy's for our filters which come with a 10 year warranty, Schneider has not won these awards. In reviewing the Schneider Circular True Polarizing Filter 4x4 on their website and here on the B&H website I see no mention of this filter being multi-coated.

Q: 8. Will this work with the Wooden Camera Zip Box Pro 4.5in Round Filter Stage?

A: Yes.

Q: 9. Is there one or a quantity of four filters per package?

A: This would be one linear polarizer measuring 4 X 4.

Q: 10. What is the difference between Ultra Pol Circular vs Ultra pol LINEAR? Which one will work best in my matte Shape-2 4x4 case and with my Sony A7SII?

A: If you are also using a variable ND on your camera and want to use a polariser as well, you definitely need a circular one as a linear polariser will cause a colour shift as you rotate it.