Helping to reduce reflections and glare, the 138mm Circular True-Pol from Schneider is a circular polarizer well-suited for cine applications. This filter suppresses reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface, which results in a noticeable increase in the saturation of skies and foliage, as well as clearer imagery when working in hazy conditions. Compared to the traditional True-Pol linear polarizing filter, this circular polarizer is ideal for preventing viewfinder blackout when used with cameras featuring polarizing elements in the beam-splitter of their viewing system, such as the Arriflex 435 and MovieCam Compact.

The filter is constructed by laminating the polarizing film and a 1/4-wave retarder plate between two sheets of clear water-white optical glass. An Edge Seal process is then used to guard against edge chipping and delamination, as well as contribute to reducing edge reflections and flare.

The 138mm filter can rotated within the 4 x 5.65" frame.