Lee Filters 75x90mm Seven5 Big Stopper 3.0 Neutral Density Filter Lee Filters 75x90mm Seven5 Big Stopper 3.0 Neutral Density Filter - Cordura Protective Pouch - Lee Filters Warranty 3.0 ND filter darkens the image, allowing you to photograph with a longer shutter speed or wider aperture than normally required Providing a 10-stop exposure reduction, this filter allows you to control depth of field and convey movement more easily