The Vu SION Q-ND1 100mm×100mm Filter is ideal when working with wide apertures and slow shutter speeds. This rectangular filter has a neutral density of 0.3 that controls the exposure by 1 stop. This SION Q-ND filter is made of optical glass that offers clarity and vivid colors in the image. Each glass surface of the filter is coated with seven layers of anti-reflection coating to address the issue of ghosting and flaring. Thanks to the flat-wave overcoat, water splashes on the filter can be easily wiped off.