The Tiffen 95mm Coarse Thread 0.9 Neutral Density filter is a uniform ND filter with an 8x filter factor that provides a 3-stop exposure reduction. Its density of 0.9 creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required. By slowing your exposure time or increasing your aperture, you can more easily control depth of field and convey motion. Neutral density filters do not affect the colouration of the image and are ideal for use in combination with other filters. This filter is manufactured using ColorCore technology, a process that involves laminating the filter substrate between 2 pieces of optical glass, grinding it flat to a tolerance of 1/10,000th of an inch, and then mounting it in precision metal rings. - The 0.9 neutral density filter darkens the image, allowing you to photograph with a slower shutter speed or wider aperture than normally required. - Providing a 3-stop exposure reduction, this filter allows you to more easily control depth of field and convey motion. - The filter does not affect the colouration of the image and is ideal for use with other filters. - The 95mm front thread allows use with other filters. - Plastic case for storage and transport. Specifications