Kodak Wratten 2 Neutral Density Filters are used in image forming optical systems to reduce light intensity across the visible spectrum without altering the spectral profile. These ND filters feature tolerances of ±10% of the nominal diffuse density. Although Kodak Wratten 2 Neutral Density Filters transmit the infrared spectrum, neutrality is controlled only in the visible spectrum. All ND filters are 0.1mm in thickness.
Note: Storage in humid environments can cause the filters to cloud and temperatures should not exceed 50°C for extended periods. Every 0.3 density increment equals one f-stop.