The B and W 55mm XS-Pro 803 ND Filter lets you achieve the desired depth of field by allowing to use a slow shutter speed and wide aperture in daylight. With the filter's slim brass mount, you can attach it to mirrorless cameras and DSLRs. The filter has a 0.9 density that brings a reduction in exposure by 3 stops. This filter has a 3-layer MRC multi-coating provided through a thin-film technology. The outer layer of the coating resists dust and moisture while the inner layer decreases reflections to boost image saturation. This filter has a 55mm accessory thread that accepts lens covers and hoods.