This Nano-X HD Green Multi-Coated Waterproof Circular Polarizer Filter from K&F Concept is a 37mm multi-coated glass circular polarizing filter that helps reduce reflections and glare by filtering out light that has become polarized due to reflection from a nonmetallic surface. The light from the sun 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 directionally polarized light, allowing for the absorption of much of this light. This results in a noticeable reduction of glare and reflections from nonmetallic surfaces and an increase in the saturation of skies and foliage.

This filter is constructed from German Schott B270 optical glass for clarity as well as color fidelity, and it features green multi-coating to prevent internal ghosting and reflections. In addition, each surface features resistance coating to prevent minor abrasions, repel water droplets, and resist smudging from grease and oil. It is made with an aluminum alloy filter ring that can be rotated to adjust the intensity of the polarization effect.

Circular Polarizer Filter    Helps Eliminate Reflections and Glare    Reduces Haze in Landscapes    Greater Color and Tonal Saturation    Multi-Coating and Resistance Coating    Schott B270 Optical Glass    Aluminum Frame

Related Questions and Answers

Q: 1. Does this have threads on the front side too? I'd like to attach a lens hood

A: Yes, this does have front filter threading. You can attach a lens hood to this filter.

Q: 2. does it have a 67mm filter thread to stack another filter on top of it?

A: The K&F Concept ND2-ND400 Blue Multi-Coated Variable ND Filter (67mm) will be able hold another filter on top of it, the size of the filter to mount is 72MM.

Q: 3. Will I be able to put on a lens hood onto the front of the filter?

A: Hi--yes, you can attach a lens hood to this filter.

Q: 4. Are these filters glass or resin?

A: The K&F Concept ND2-ND400 Blue Multi-Coated Variable ND Filter (72mm) is a glass filter.

Q: 5. Is this filter suitable for solar eclipses?

A: No, the K&F Concept ND2-ND400 Blue Multi-Coated Variable ND Filter would not be suitable for solar eclipses. Using this filter for solar eclipses could result in damage to your camera, and if you are using a DSLR camera, could cause major damage to your eyes. If you are looking for a suitable option for eclipses, I would recommend this: https://bhpho.to/3VcNfph

Q: 6. Can I put it on a sigma 30 mm lens?

A: In theory you could with a step down ring, but you'll get vignetting on the edges. I'd recommend getting the correct 52mm filter.

Q: 7. Is it stackable

A: No, the K&F Concept Nano-X ND2-32 Variable Fader & Circular Polarizer HD Green Coated Waterproof Anti-Scratch Japan Optics Filter (77mm) does not have filter front threads.

Q: 8. Is this actuality German Schott glass used in this filter? Some make statements that it is not.

A: Yes, the K&F Concept Green Multi-Coated Schott B270 German Optics Slim UV Filter, is made of German Schott B270 optical glass.

Q: 9. Is there any polarization effect with this filter?

A: The K&F Concept ND2-ND400 Blue Multi-Coated Variable ND Filter (82mm) reduces exposure, but there is no polarization effect.

Q: 10. Will this work with the Sony A7SIII?

A: This filter will work with any lens with a 67mm thread.