This NiSi 6.6 x 6.6" Rotating 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.

Constructed from optical glass, this filter is mounted within a 7mm-thick, 6.6 x 6.6" aluminum-alloy filter tray for use in matte boxes that can accommodate ARRI R2 filter rings. In order to adjust the intensity of the polarization effect, an external dial on the filter tray allows for the independent rotation of the circular polarizer. Each glass surface includes one layer of nano coating which results in an improved beading effect when in contact with water or oil for greater cleaning efficiency.

Mounted Circular Polarizer Filter    For ARRI R2-Compatible Matte Boxes    Rotatable, Optical Glass    Nano Coating    7mm-Thick, Aluminum-Alloy Filter Tray    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    Padded Pouch

Compatible with matte boxes that can accommodate ARRI R2 filter rings.

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 to 2.8x filter factor reduces exposure by +1 to 1.5 stops.

Constructed from optical glass for clarity and mounted within an aluminum-alloy, 7mm-thick, 6.6 x 6.6" filter tray.

Each glass surface includes one layer of nano coating that results in an improved beading effect when in contact with water or oil for greater cleaning efficiency.

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

Padded pouch included for storage and transport.

Related Questions and Answers

Q: 1. Does this filter screw onto the front element? Or is it made to use with filter holder system only? I need it for my Canon 24-70L II, which has an 82mm thread. Thank you.

A: Yes, it is a regular screw in type filter.

Q: 2. Is the front of the filter threadable ?

A: Yes, the filter feature front threads

Q: 3. Would I get vignetting at 14mm? I'd be using on the Nikkor S 14-30mm.

A: Tested it out, and none that we can see.

Q: 4. Are the metal rings made of brass or aluminium? Product overview sections mentioned as brass and aluminium in specifications.

A: The NiSi Pro Circular Polarizer Filter has brass filter rings. Not aluminum.

Q: 5. Can this be used with a Tamron 15-30mm f/2.8 filter holder system?

A: This will not mount to the NiSi Tamron 15-30mm holder or any other holder for that lens that we are aware of.

Q: 6. Are there adapter rings for the 82 mm kit to allow the filters to be used on 67mm and 72mm lenses?

A: You can use a standar step up ring to connect the 82mm filters on lenses with a smaller diameter. Please review the options below. 1-67-82mm step up ring https://bhpho.to/3IMV5yt 2- 72-82mm step up ring https://bhpho.to/3Pb6RGo

Q: 7. Difficult to compare without actual purchase. Ex, compared to Formatt Hitech 67mm Firecrest SuperSlim Circular Polarizer Filter.....(for 67mm variant)....which has a thinner metal ring thickness? Which has a higher light transmission?

A: The Formatt Hitech would be a slightly thinner filter, but the NiSi would have higher light transmission.

Q: 8. What's the filter thickness?

A: It is about 6-7mm thick.

Q: 9. Does the front of the filter has threat to attach a step up ring ? I'm planning to attach a 82-95 step up ring in front of this filter

A: Yes, each of the NiSi filters in this 82mm Circular ND filter kit have 82mm front threads for attaching other rings/filters.

Q: 10. Do these produce the most neutral in colors?

A: Yes these filter would produce the most neutral colors.