The ARRI Rota Pola Frame for Cinematic Lightinghelps 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.

Constructed from Water White glass for increased clarity as well as color fidelity, this filter is mounted within an aluminum-alloy filter tray for use in matte boxes that can accommodate ARRI F4 filter frames. To adjust the intensity of the polarization effect, an external dial on the filter tray allows for the independent rotation of the circular polarizer. Once the desired effect has been achieved, the filter tray's integrated lock can then be used to ensure that the position of the polarizer filter remains unchanged.

Mounted Circular Polarizer Filter    For ARRI F4-Compatible Matte Boxes    Rotatable, Water White Glass    Aluminum-Alloy Filter Tray    2.3x Filter Factor, +1.2 Stops    Helps to Eliminate Reflections and Glare    Reduces Haze in Landscapes    Greater Color and Tonal Saturation    Integrated Lock for Polarizer Filter

Compatible with matte boxes that can accommodate ARRI F4 filter trays.

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.

2.3x filter factor reduces exposure by +1.2 stops.

Constructed from Water White glass for clarity and mounted within an aluminum-alloy filter tray.

Non-coated.

External dial on filter tray allows for the rotation of the polarizer filter to adjust the intensity of the polarization effect.

Filter tray's integrated lock can be used to ensure that the position of the polarizer filter and its effect remains unchanged.

Related Questions and Answers

Q: 1. Will this filter fit in the MovCam MM4 mattebox? I know the Tiffen fits, but this one Im not sure

A: After purchasing both the MM4 mattebox by Movcam and the ARRI RotaPola, they fit. So the answer is yes, they will work together.

Q: 2. Will this work with a 114mm lens?

A: Yes. That is the following filters cap 114mm lens is the biggest it is able to work.

Q: 3. What makes this not compatible with Titla? I have the MB-T12 and it says trays are compatible with Arri and Panavision trays which this will work with.

A: According to the manufacture of this product it is not compatible with Redrock Micro and Tilta Matte Boxes. The exact reasons are not specified, however it more than likely will have to do with the shape of this tray not fitting those Matte Boxes well.

Q: 4. Does this filter come with any sort of protective soft case?

A: It does!

Q: 5. Is the glass inside 138mm or a 4.5" filter?

A: I contacted ARRI concerning your inquiry. They state they do not have the filter on hand to measure, and while their website does not list the glass size measurement, they do believe it is a 4.5" filter. They state if you require the 138mm size, you need to go with a larger matte box and purchase the ARRI Rota Pola Filter Frame 6.6x6.6, B&H # ARK20017086.

Q: 6. Is the polarizer glass fixed and non-replaceable?

A: Correct.

Q: 7. Any concerns with color shift vs other popular models? (Such as the Revar cine product?)

A: It is recommended you white balance with it on as with any filter but once you have there would be no color shift no. This is an excellent circular polarizer.

Q: 8. Hi. Does it work with tilta MB-T12? Thank you

A: Yes this filter should work with the Tilta MB-T12.

Q: 9. Is this compatible with the older Arri MB20?

A: No. It is not compatible with the Arri MB20.

Q: 10. Does this fit with SmallRig matte boxes?

A: Yes, the Revar Cine Rota-Pola Tray will fit in a SmallRig matte box that uses 4x5.65 filter tray.