NISI CINE FILTER NANO IRND 4X5,65" 0,9This NiSi Nano IRND Filter is constructed from optical glass for clarity as well as color fidelity Neutral density filter darkens the image, allowing you to photograph with a longer shutter speed or wider aperture than normally required. This type of filter allows you to control depth of field and convey movement more easily Filter does not affect coloration of the image and is ideal for use with other filters. Each surface includes one layer of NiSi