The Tiffen 4x5" 85B Polarizer Filtercombines both an 85B color conversion filter with a linear polarizing filter to blend the effects of both filter types into a single, convenient solution.

The 85B color conversion aspect of the filter provides a warming effect and decreases the color temperature from 5500K to 3200K, allowing the use of tungsten balanced film in daylight conditions.

The linear polarizing aspect of the filter helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface. This results in a noticeable increase in the saturation of skies and foliage, as well as clearer imagery when photographing in hazy conditions. A linear polarizer differs from a circular polarizer in that it does not supports use of a camera's autofocus or auto exposure functions; it is best suited for use with manual cameras, such as view cameras, that are not dependent on internal mechanisms to determine focus or metering settings.

There is a total filter factor of about 6x, requiring an increase of 2.6 stops for normal exposure. 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. This filter measures 4 x 5" / 101.6 x 127mm.

Color Conversion 85B and Polarizer    Warming Color Conversion Filter    5500 to 3200K Color Temp Decrease    Helps to Eliminate Reflections and Glare    Reduces Haze and Blue Cast in Landscapes    Greater Color and Tonal Saturation    ColorCore Technology

Linear polarizer and 85B amber color conversion filter combination.

Total filter factor of approximately 6x requires 2.6 stops of additional exposure for normal results.

Warming 85B color conversion filter decreases color temperature from 5500K to 3200K for using tungsten-balanced film in daylight conditions.

Polarizer helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface.

Clears up haze in distant landscapes and provides more saturated, vivid colors.

Strongest polarizing effect when used at a 90° angle from the sun.

Related Questions and Answers

Q: 1. Will this work with the Wooden Camera Zip Box Pro 4.5in Round Filter Stage?

A: Hi, this filter is compatible. with the Wooden Camera Zip Box Pro 4.5in Round Filter Stage.

Q: 2. Why isn't it available in 46mm filter size? That's the size most of my Micro Four Thirds lenses are.

A: Charles... this filter is available, but B&H does not list it on their website as it is considered Special Order . Please call B&H directly and tell them you would like to request they special order item # 46WPOL from Tiffen. I currently show a few of these in stock and they can be dropped shipped directly from Tiffen to you when ordered through B&H.

Q: 3. Thickness of the filter

A: 4mm

Q: 4. Will this work with the Wooden Camera Zip Box Pro 4.5in Round Filter Stage?

A: Yes.

Q: 5. how is this designed to work? Does it need a 138mm circular polarizer in combination with this filter?

A: You would need a holder that will take this size filter. The exact holder depends in part on the lens you are using.

Q: 6. What range of sizes can this filter fit?

A: This is a 77mm filter. It will fit any lens with a 77mm filter thread on the front of the lens. Tiffen does make this and many other filters in other sizes as well. Just do a search at B&G for Tiffen Filter . You'll see many types of filters in many sizes. I srongly recommend Tiffen filters -- the price is reasonable, yet the quality is very high.

Q: 7. Hello,What is the difference between this product and the Tiffen 82mm Circular Polarizing Filter?Thank you,Nansen

A: A linear polarizer only differs from a circular polarizer in that it does not contain a quarter wave plane that enables use of auto focus and exposure features. It is generally advised to not use linear polarizers with digital cameras, as digital SLRs are dependent on internal mechanisms to determine focus or metering.

Q: 8. 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: 9. So I was just curious does this come with any sort of case?

A: This filter comes in a hard plastic case.

Q: 10. Since you are out of stock on the Tiffen 49mm Cir. Pol., can I use a linear polarizer instead on a mirrorless camera? My recollection is that Cir. Polarizer was developed to compensate for the effect of the mirror on light measurement in the camera, and if so, then shouldn’t be necessary for mirrorless camera.

A: Yes, a linear polarizer will have no effect on metering or autofocus (PDAF or CAF) in a mirrorless camera, which historically would cause metering and autofocus issues in cameras with mirrors or single-translucent lenses (SLTs).