The 100 x 100mm K-Series Neutral Density Filter from H&Y Filters is an ND filter with a 8x filter factor that provides a 6-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 increasing your aperture or slowing your exposure time, you can control 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.100 x 100mm K-Series neutral density filters are constructed from Gorilla glass for enhanced scratch resistance, increased 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.The 100 x 100mm K-Series Neutral Density Filter is pre-installed with an H&Y Filters 100 x 100mm Quick Release Magnetic Filter Frame for use with an H&Y Filters 100mm K-Series Filter Holder. When combined with a 100mm K-Series Filter Holder that is configured with a pair of magnetic filter slots, filters each with a Quick Release Magnetic Filter Frame can be magnetically stacked in front of a camera lens instead of inserted only within a specific number of filter holder slots, allowing the user to determine the number of filters to be applied, all of which can be quickly installed, repositioned, or switched with a different filter needed for other subjects or changing lighting conditions.While in use, front-facing center finder rulers on the side sections of this Quick Release Magnetic Filter Frame help enable precise positioning of the 100 x 100mm neutral density filter, relative to another filter it is stacked on. The Quick Release Magnetic Filter Frame also serves to reinforce the edges of the 100 x 100mm neutral density filter, enhancing that filter's rigidity and promoting sharp results by helping to ensure that the filter remains flat. A filter pouch for storage and transport, as well as a microfiber cleaning cloth for filter maintenance, are also provided.H&Y Filters 100 x 100mm K-Series Neutral Density Filter100 x 100mm neutral density filter darkens the entire image, allowing you to photograph with a longer shutter speed or wider aperture than normally requiredProviding a 6-stop exposure reduction, this filter allows you to control depth of field and convey movement more easilyFilter does not affect coloration of the image and is ideal for use with other filtersEach 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 efficiencyConstructed from Gorilla glass for enhanced scratch resistanceFilter pouch for storage and transport, as well as a microfiber cleaning cloth for filter maintenanceH&Y Filters 100 x 100mm Quick Release Magnetic Filter FramePre-installed along the edges of the included 100 x 100mm neutral density filter for use within an H&Y Filters 100mm K-Series Filter Holder that is configured with a pair of magnetic filter slotsAllows a 100 x 100mm neutral density filter to be magnetically stacked in front of a camera lens along with other filters that have a Quick Release Magnetic Filter Frame installed, instead of inserted only within one of a specific number of filter holder slotsHelps allow the user to determine the number of filters to be applied when using a 100mm K-Series Filter Holder, all of which can be quickly installed, repositioned, or switched with a different filter needed for other subjects or changing lighting conditionsReinforces the edges of the 100 x 100mm neutral density filter, enhancing that filter's rigidity and promoting sharp results by helping to ensure that the filter remains flatFront-facing center finder rulers on side sections of this Quick Release Magnetic Filter Frame help enable precise positioning of the 100 x 100mm neutral density filter relative to another filter it is stacked on