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The Lee SW150 ND 4 stop ProGlass IRND filter is manufactured from 2mm thick optically flat glass. Originally developed for the movie industry, to meet the exacting requirements of leading cinematographers the ProGlass IR filters have virtually no colour shift and extremely accurate stop values. They also block both ultraviolet and infrared pollution, creating accurate, crisp and punchy images. To accompany the filters, a Lee exposure app is available free to download for Apple and Android devices. ProGlass IR ND filters come in 0.6ND (2-stop), 0.9ND (3-stop), 1.2ND (4-stop), 1.8ND (6-stop), 3ND (10-stop) and 4.5ND (15-stop) versions, to cover every photographic need, from subtle alterations up to ultra-long exposures.
ProGlass IRND filters are neutral, so colour casts are a problem of the past. And, because they block both ultraviolet and infrared pollution, images are crisp and punchy.
Manufactured from 2mm-thick optically flat glass, ProGlass IRND filters not only prevent focus shift, but are also durable and long lasting.
The 'ProGlass Exposure' App is free to download for both Apple & Android devices. It uses the same functionality as the existing LEE Stopper App but is designed specifically for the filters in the new ProGlass IRND range.