The Freewell 67mm Magnetic Quick-Swap Neutral Density 1.5 Filter is an ND filter with a 32x filter factor that provides a 5-stop exposure reduction. An included Freewell 67mm UV Filter allows the ND filter to be used on a lens with 67mm front filter threads. The ND filter's 1.5 density creates a darkening of an entire image without affecting the image's coloration, 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. Each surface of the Freewell 67mm Magnetic Quick-Swap Neutral Density 1.5 Filter and the Freewell 67mm UV Filter is multicoated to help eliminate internal ghosting and reflections. The Freewell 67mm Magnetic Quick-Swap Neutral Density 1.5 Filter and the Freewell 67mm UV Filter are also coated for resistance to oil, dust, and scratches, offering greater protection to the filters and helping them to stay clean for longer than with uncoated filters. The coatings are also hydrophobic, resulting in an improved beading effect when in contact with water, for greater cleaning efficiency. The Freewell 67mm Magnetic Quick-Swap Neutral Density 1.5 Filter also includes 67mm front threads, permitting the use of screw-on filters with 67mm rear threads.