The NiSi 46mm Pro 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.

The NiSi 46mm Pro Circular Polarizer Filter is constructed from optical glass for clarity as well as color fidelity. It features a brass filter ring that can be rotated in order to adjust the intensity of the polarization effect while enhancing durability and jamming prevention. Additionally, one layer of NiSi Optical Nano Coating is applied to each of this filter's surfaces to create an improved beading effect when in contact with water for greater cleaning efficiency.

Circular Polarizer Filter    2 to 2.5x Filter Factor, +1 to 1.3 Stops    Helps to Eliminate Reflections and Glare    Reduces Haze in Landscapes    Greater Color and Tonal Saturation    NiSi Optical Nano Coating    Optical Glass Construction    Brass Filter Ring    46mm 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.

NiSi Optical Nano Coating creates an improved beading effect when in contact with moisture for greater cleaning efficiency.

2 to 2.5x filter factor reduces exposure by 1 to 1.3 stops.

Constructed from optical glass for clarity.

Brass filter ring helps to prevent jamming, and provides additional strength.

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

Side knurling to provide a more textured grip when mounting or removing filter from a lens.

46mm front filter threads allow for use with other filters.

Plastic filter case for storage and transport.

Related Questions and Answers

Q: 1. Will this work on a Sony a6000 ??? Sometimes these Circular types will not work on particular Digital Cameras !!! Thank You !!!

A: This filter will work with any lens that has a 40.5mm diameter. Circular polarizers are compatible with digital cameras, however linear polarizers are not.

Q: 2. 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: 3. What is the origin of the glass in the filter?

A: Unfortunately Nisi does not specify the type of glass used in the Pro Circular Polarizer Filter.

Q: 4. What color balance is recommended for this?

A: The color balance recommended for this NiSi 46mm Natural Night Filter is "Daylight".

Q: 5. There is a DJI Mavic 3 and a DJI Mini 3 Pro. Which is this for? Both?

A: The PolarPro Circular Polarizer Filter is compatible with the DJI Mini 3 with RC-N1 Remote and the DJI Mavic Mini 3 Pro.

Q: 6. Can this be used with the Nisi V6 holder system?

A: No, this is a standard screw in filter for a lens with a 95mm filter thread.

Q: 7. Will this fit on top of the NiSi Swift VND system?

A: NiSi Swift True Color Pro Nano CPL for True Color VND and Swift System (82mm) does not front threads. You can connect the NiSi 82mm True Color Pro Nano Circular Polarizing Filter first and then attach the Variable ND filter on top if necessary. However, the VND filter mention above already has a coat of CPL on the glass.

Q: 8. Is this compatible with Sigma 500mm f/4 rear drop-in filter holder?

A: Yes, the NiSi 46mm Natural Night Filter should work with the Sigma 500mm f/4 DG OS HSM Sports Lens.

Q: 9. Is this a dual ring filter where you can turn the filter and make sure the lines of polarization are horizontal?

A: Yes. The NiSi 95mm Pro Circular Polarizer Filter has 2 rings. One rotates to change the polarization in the scene.

Q: 10. Can i stack a NISI ND Filter to this polarizer?

A: No problem!