LEE filters ProGlass IRND filters are a range of high-quality filters manufactured from 2mm thick optically flat glass. Two years in the making, the ProGlass range is entirely neutral, with virtually no colour shift and extremely accurate stop values. And, because they block both ultraviolet and infrared pollution, images are crisp and vibrant, and above all, accurate. The SW150 ProGlass 0.9 IRND is a long exposure filter that reduces the amount of light entering through your lens by three stops. By increasing your exposure time you can make anything that is moving in the image appear blurred or ghostlike for example clouds, waterfalls, people or traffic. The SW150 ProGlass 0.9 IRND is compatible with the separately available LEE Filters SW150-Series filter holder and is suitable for both film and digital photography. It can also be used in combination with other LEE Filters such as ND Grads, to customise your filter setup for any lighting situation.
