Our ProGlass Cine range of neutral-density filters has been designed to meet the exacting needs of all cinematographers, whether shooting digitally or on film. They are remarkably neutral, eliminating infrared pollution and ensuring all colors remain absolutely accurate and true. This simplifies workflow, saves time and enables cinematographers to focus on their creative goals. The LEE Filters 4 x 5.65 ProGlass CINE IRND 0.6 Filter (2-Stop) filter is an ND filter that provides a 4x filter factor with a 2-stop exposure reduction. Because you are slowing your exposure time or increasing your aperture, you can control the depth of field and convey movement more easily. ND filters are not intended to affect coloration of the image and are ideal to pairing with other filters. Fabricated from 4mm-thick, optically flat, scratch-resistant glass, then edged with a metal rim, the ProGlass Cine filters not only prevent focus shift, they are also durable and long lasting. The ProGlass Cine range has been endorsed at the highest level in the movie industry and have been used successfully on a number of major feature films and TV dramas.