LEE Filters – Big Stopper 100×100 Glass 10 Stop 1000x

The LEE Filters Big Stopper is a neutral density filter made from optical glass that reduces the amount of light entering the lens to enable long shutter speeds. It is available for the 100mm, SW150 and Seven5 systems. The filter is packaged in a protective tin case and carries a lifetime warranty. The LEE Big Stopper reduces the light by 10 stops with a filter factor of 1000, and has a density of 3.0, meaning a regular two-second exposure would calculate to a 32 minute exposure.