H&Y K-Series Drop-In KN4 ND4000 3.6 Filter (12-Stop)
Drop-In K-Series Neutral Density 3.6 Filters are constructed from SCHOTT B270 glass for increased optical clarity and color fidelity. Each side of this filter includes eight layers of anti-reflection coating to prevent internal ghosting and reflections as well as an anti-smear nano coating for an improved beading effect when in contact with water or oil for greater cleaning efficiency.
- Drop-in neutral density filter for a separately available H&Y Filters 100mm K-Series Filter Holder
- 3.6 neutral density filter darkens the image, allowing you to photograph with a longer shutter speed or wider aperture than normally required
- Providing a 12-stop exposure reduction, this filter allows you to control depth of field and convey movement more easily
- Filter does not affect coloration of the image and is ideal for use with other filters
- Each glass surface includes eight layers of anti-reflection coatings to prevent internal ghosting and reflections as well as an anti-smear nano coating for an improved beading effect when in contact with water or oil for greater cleaning efficiency
- Constructed from SCHOTT B270 glass for increased optical clarity
- Filter pouch for storage and transport
K-series | Drop-in ND Filter
H&Y Drop-in ND Filter for K-series Magnetic Holder is made of high-quality SCHOTT B270 glass. Double-sided vacuum coatings allow even light attenuation.
In addition to our 100x100mm and 100x150mm filters, you can drop in a 95mm circular filter encased in a lightweight aluminum frame. This adds additional versatility to photography. In a multitude of categories within photography and videography, by being able to use Circular Polarising filters, as well as solid ND filters including 6 and 10 stops. Long exposure photography and better depth-of-field control would be possible while stacking multiple graduated filters using our patented magnetic holder system.
Benefits of Using Drop-in Filters

- Amazing combinations of filter choices can be made with rectangular filter
- Easy switch between CPL/ ND/ CPL&ND/ Night Filters
- Reframing/ recomposing a picture becomes very easy (ND filter can be removed at anytime)
- Highly rotatable CPL even with rectangular filter installed
Simple Operation
What is Neutral Density (ND) Filters?
Instead of reducing the aperture to limit light, you can add a Neutral Density filter to limit light, and can then set the shutter speed according to the particular motion desired (blurring water movement, for example) and the aperture set as needed (small aperture for maximal sharpness or large aperture for narrow depth of field (subject in focus and background out of focus). Using your camera, you will see the image right away and can choose the best ND filter to use for the scene being captured by first knowing the best aperture to use for maximal sharpness desired. The shutter speed would be selected by finding the desired blur from subject movement. The camera would be set up for these in manual mode, and then the overall exposure adjusted darker by adjusting either aperture or shutter speed, noting the number of stops needed to bring the exposure to that which is desired. That offset would then be the amount of stops needed in the ND filter to use for that scene.
What Our ND can do for you?
RELATED PRODUCTS – Drop-in ND Filter
H&Y K-series Drop-in Night Filter | H&Y K-series Drop-in ND CPL Filter | H&Y K-series Drop-in CPL Filter
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