The B+W 43mm SC 103 ND 0.9 Filter is a neutral density filter with a 8x filter factor that provides a 3-stop exposure reduction. Its 0.9 density creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required. By increasing your aperture or slowing your exposure time, you can control depth of field and convey movement more easily. B+W filters are constructed from SCHOTT glass for increased optical clarity. This filter features a brass filter ring for durability as well as to prevent jamming. Providing a 3-stop exposure reduction, this filter allows you to control depth of field and convey movement more easily. Single coated to prevent internal ghosting and reflections. Brass filter ring helps to prevent jamming and provides additional strength

B+W SC 103 Specs