This 6.6 x 6.6" Schneider ND & Circular Polarizer Filter 6.6x6.6" 3-Stopis a filter that combines a solid neutral density effect and a circular polarizer effect within a single glass surface. The solid neutral density effect provides an exposure reduction of 3 stops. Its 0.9 density creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed than would normally be required. By slowing your exposure time or increasing your aperture, you are able to control depth of field and convey movement more easily.

Along with this filter's solid neutral density effect is a circular polarizer effect that is simultaneously applied to help 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. 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 6.6 x 6.6" Neutral Density 0.9 Circular Polarizer Filter is constructed from water white glass for increased optical clarity as well as color fidelity. It is compatible with filter holders that can accommodate 4mm-thick, 6.6 x 6.6" rectangular filters.

0.9 Optical Density    Non-Coated, Water White Glass    Reduce Exposure by 3-Stops    Darkens Entire Image    Allows Reduced Shutter Speed    Allows Wider Aperture    Integrated Circular Polarizer Effect    Reduces Haze in Landscapes    Helps to Eliminate Reflections and Glare    Greater Color and Tonal Saturation

0.9 neutral density filter effect darkens the image, allowing you to photograph with a longer shutter speed or wider aperture than normally required and is combined with a circular polarizing effect to help reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface

8x filter factor provides a reduction of 3 stops; neutral density filter effect allows you to control depth of field and convey movement more easily

Polarizing filter effect arranges, and filters, 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 polarizing 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

Constructed from water white glass for increased optical clarity

Non-coated

Padded pouch included for storage and transport

Related Questions and Answers

Q: 1. What can I use as a front cap for this item (dont tell me Schneider 86mm Push-On Cap because it does NOT fit)?

A: This Sigma LCF-86 III 86mm Lens Cap is compatible with the Genustech 82mm Variable Neutral Density and Circular Polarizer Filter. https://www.bhphotovideo.com/c/product/1168370-REG

Q: 2. I have a Canon 24-105mm f4L(77mm). I already have a 77mm protective filter on it; with threads, so I can stack another filter. What size ND filter should I order?

A: Protective filters have the same size front and rear threads so a 77mm variable ND would be recommended.

Q: 3. Do these filters have cross polarization X?

A: No, they don't.

Q: 4. 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: 5. Does this produce an X-Pattern at max ND?

A: It does at just beyond max, I just back it off a tiny bit and it's fine. The ND range is large enough that if you need to go beyond max, it's a sign that adjusting the ISO a touch might be a good idea.

Q: 6. Where are these made? Thanks.

A: These are manufactured in China.

Q: 7. What can I use for a front cap for this? I've tried 86mm lens caps and they do not work.

A: You could use an 86mm push-on lens cap that doesn't have threads for the Genustech 82mm Variable Neutral Density and Circular Polarizer Filter: https://www.bhphotovideo.com/c/product/157564-REG/Schneider_91_030386_86mm_Push_On_Lens_Cap.html

Q: 8. Can you use a lens hood with this? I am new to photography and can't seem to find one that would fit in or over this

A: The front of the K&F Concept Nano-X Circular Polarizer plus Variable ND2-ND32 Filter (58mm) is 62mm so you can attach a 62mm hood such as this: https://bhpho.to/3gdgVNq

Q: 9. dOES IT COME WITH A POUCH?

A: While it does not include a pouch, the Genustech 82mm Variable Neutral Density and Circular Polarizer Filter, B&H # GEGPND82, does include a filter case. As listed under the "In The Box" section under the Overview tab on our website, the following items are included with the purchase of the Genustech 82mm Variable Neutral Density and Circular Polarizer Filter: In the Box Genustech 82mm Variable Neutral Density and Circular Polarizer Filter Filter Case Microfiber Cleaning Cloth Polarizer Element Rotation Handle Limited 1-Year Warranty

Q: 10. 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.