DPReview: Breakthrough Photography claims X3 CPL is world's sharpest circular polarizer

Breakthrough Photography, a San Francisco-based startup, is seeking funding for what it claims is the 'world's sharpest and most color neutral circular polarizer,' the X3 CPL. This polarizer is constructed with Schott B270 optical glass from Germany, MRC16 and nanotec coatings, a weather-sealed brass Traction Frame, and new American-made CrystalVision CPL film. Read more

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