B+W HTC High Transmission Circular Polarizer Käsemann MRC
For this high-end polarizing filter the foil pieces are selected individually for maximum color neutrality. Following cementing between high-grade optical glass, additional grinding and polishing takes place. This guarantees outstanding sharpness even with very bright, apochromatic lenses. The new generation of Käsemann High Transmission (HTC) polarizing filters is fitted with a new polarizing foil, which has higher translucency (transmission), yet still provides outstanding effectiveness. The filter extension factor is only 2 to 3, equivalent to approx. 1 to 1.5 f-stops.