The B+W 77mm SC 102 ND 0.6 Filter is a neutral density filter with a 4x filter factor that provides a 2-stop exposure reduction. Its 0.6 density creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required. Neutral density filters do not affect the coloration of the image and are ideal for pairing with other filters. 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 2-stop exposure reduction, this filter allows you to control depth of field and convey movement more easily. Brass filter ring helps to prevent jamming and provides additional strength

B+W SC 102 Specs