The Calumet CALSAN0477 is a high-quality neutral density camera filter designed specifically for photographers who want precise control over their exposure. With a filter diameter of 77 mm, this filter is suitable for a variety of lenses and allows for a reduction in the amount of light hitting the sensor without affecting color reproduction. The ND4 filter provides a uniform light attenuation of 2 stops, which is particularly useful for achieving longer exposure times in bright lighting conditions or controlling depth of field. The filter is elegantly designed in black and made from transparent material, ensuring a clear view of the subject. Sold as a single unit, the CALSAN0477 is a practical addition to any photography kit, enhancing creative photographic techniques by increasing exposure flexibility.