This 4 x 5.65" Neutral Density 0.6 Filter from SmallRig reduces exposures by 2 f-stops, making it possible to reduce shutter speed for added blur, or reduce aperture to reduce depth of field for help isolate the image subject. This filter is compatible with any 4 x 5.65" matte box or filter holder that has a filter slot for 4mm-thick filters.. The filter is coated on both sides with multi-layer nano film of uniform linearity of extinction spectrum and excellent performance. These coatings are mildewproofed and water-resistant, toughened to prevent stain, and easy to clean and care for, making for a part of everyone's gear bag. The filter has high-accuracy color reproduction at moderate color temperature, which is ideal for video or film shooting.