Lee SW150 Little Stopper Filter The Little Stopper is a neutral density filter that reduces the light entering your lens by six stops. The Little Stopper is ideal for those low-light conditions at the beginning & end of the day (when the Big Stopper’s ten stops may prove too much), allowing you to enjoy increased flexibility with exposure lengths. In many shooting conditions the Little Stopper will retain detail & texture in areas of movement such as the sky & water, while still conveying a sense of time passing. Looking for the right Lee Filter for you? Use Lee’s System Match tool to find what’s compatible with your equipment.