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The X4 ND features SCHOTT Superwhite B270® optical glass, which is an ultra-clear crown glass. It is produced by melting high purity raw materials and then made using the continuous draw process. The result is excellent transmission in the ultraviolet, visible, and infrared spectrums, and a high surface quality that accepts our state-of-the-art MRC and nanotec® coatings exceptionally well.

The Breakthrough Photography 82mm X4 Solid Neutral Density (ND3) Filter is an ND filter with an 8x filter factor that provides a 3-stop exposure reduction. Its density creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required. By slowing your exposure time or increasing your aperture, you are able to control the depth of field and convey movement more easily. Neutral density filters do not affect the coloration of the image and are ideal for pairing with other filters.

To prevent internal ghosting and reflections, each glass surface includes eight layers of anti-reflection coating. This Multi-Resistant Coating (MRC) also offers greater protection to the filter substrate and helps it to stay clean for longer than with uncoated filters. The Nano coating associated with X4 neutral density filters provides an additional ninth layer over the front MRC, resulting in an improved beading effect when in contact with water for greater cleaning efficiency.

This Breakthrough Photography X4 neutral density filter is constructed from Schott glass for increased optical clarity as well as color fidelity and features a thin brass filter ring to minimize the potential for vignetting while enhancing durability and jamming prevention.