The 37mm NXT Plus 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.

This filter is constructed from optical glass for clarity as well as color fidelity and features an aluminum-alloy filter ring that can be rotated in order to adjust the intensity of the polarization effect. To prevent internal ghosting and reflections, each glass surface includes five layers of anti-reflection coating. An additional hydrophobic coating results in an improved beading effect when in contact with water for greater cleaning efficiency.

Circular Polarizer Filter    1.7x Filter Factor, +0.8 Stop    Helps to Eliminate Reflections and Glare    Reduces Haze in Landscapes    Greater Color and Tonal Saturation    Multicoated    Anti-Reflective and Hydrophobic    Optical Glass Construction    37mm Front Filter Threads    Knurled Sides, 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.

1.7x filter factor reduces exposure by 0.8 stop.

Multicoated to prevent internal ghosting and reflections while providing an improved beading effect with water for more efficient cleaning.

Aluminum-alloy filter ring for durability while remaining lightweight.

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

37mm front filter threads allow for use with other filters.

Top knurling to provide a more textured grip when mounting or removing it from a lens.

Constructed from optical glass for clarity and color fidelity.

Plastic filter case for storage and transport.

Related Questions and Answers

Q: 1. Please can someone tell me what NXT stands for in Hoya NXT polarizer filters?Thanks for tour kind attention, regardsYves T

A: It does not have any actual meaning. It is simply the designation for the next series of filters that can only be found in the US.

Q: 2. What is the difference between the NXT and the NXT PLUS?

A: The Plus is multicoated to reduce ghosting and flares and it has top knurling to provide a more textured grip when mounting or removing it from a lens.

Q: 3. Will this filter work with the Sensei step-up ring? 62mm-67mm to be precise.

A: I haven't tried it but I imagine it would.

Q: 4. Why is this lens more than twice as expensive as "Hoya 67mm HRT Circular Polarizer UV Filter" ? The other one has a UV filter too, while this does not. Is there a difference in quality or something else that I am missing in this lens that makes it so expensive ? Just trying to see which one I should buy for my Nikkor 18-300 mm lens. Thanks.

A: The more expensive filter offers two key features the other does not. Anti-Reflective and Hydrophobic Multicoated

Q: 5. Does this filter fit the Nikon 500mm f/4 insert?

A: It does not. You will need B&H # NICPL405 which is the filter specifically designed for the drop in on that lens. https://bhpho.to/2X7oHNp

Q: 6. would it work with other filters???

A: Yes, this filter can stack onto other filters. You will want to mount the Cir/Pol filter last, so you can utilize the polarization effect.

Q: 7. Does is it fits the canon RF 100-500mm ?

A: The Hoya 77mm NXT Plus Circular Polarizer Filter does fit the Canon RF 100-500mm f/4.5-7.1 L IS USM Lens.

Q: 8. does this fit Olympus tough TG5 ?

A: Yes, it does. But you have to buy the Olympus CLA-T01 adaptor in order mount the filter. This is the same adaptor that is used to mount the Olympus wide-angle and telephoto extender lenses on the camera.

Q: 9. Can this be used with a Canon Powershot SX420 is ?

A: No, this filter is not compatible with the SX420.

Q: 10. Is this 46 mm filter compatible with the 800mm PF lens Z Mount?

A: No, the Hoya 46mm NXT Plus Circular Polarizer Filter will not work with the Nikon NIKKOR Z 800mm f/6.3 VR S Lens. That lens can only use the Nikon C-PL460 Slip-In Circular Polarizer, BH #NICPL460 (https://bhpho.to/3HdDhfm).