True-Pol Polarizing Filters: This is by far the most effective polarizer for motion picture and television cameras. Having an extinction ratio of ER 374, the Schneider True-Pol is 12 times more effective than other polarizing filters, and is unmatched in its ability to reduce glare and unwanted reflections, saturate colors, deepen blue skies, improve contrast, and penetrate haze. True-Pol Polarizing filters enable you to achieve a level of optical performance previously unavailable to cinematographers. Diamond cut from crystal-clear, water-white optical glass, Schneider filters are ground and polished to a precise flatness and plane-parallelism (exact parallel relationship between front and back filter surfaces). Then, to ensure perfection, this is verified by a laser interferometer. Schneider filters are then checked with a densitometer for consistent density, and tested with a spectrophotometer for proper light transmission. It's due to this ultra-high consistency, that allows cinematographers to swap like filters mid-shoot with no discernible variation in color or effect. What's more, the unprecedented purity, color saturation and repeatability of Schneider filters virtually eliminate the need for lab color timing correction. Schneider filters stand up to the most rigorous demands on set or location. Manyfeature Schneider's specially formulated hard anti-reflective (AR) coating to resist flaking, peeling and scratching. This proprietary coating also r