Schneider offers a circular True-Pol Polarizing filter for cameras which use polarizing elements in the beam-splitters of the viewing system, such as ARRI 435 and the Movie-Cam Compact. This filter may also be required on certain high definition video cameras with complex optical blocks such as the Sony PMW-EX1, PMW-EX3, and PDW-700 which polarize the red an blue channels more than other cameras and therefore require a circular polarizer to prevent cross polarization and associated color shift in the image.
Beam splitters send light in two directions: to an eye-piece and to a video tap. Light in a camera’s viewing system can become polarized, and when a standard (linear) polarizing filter is attached to the lens, the light becomes cross polarized.
This hinders visibility and may create total black-out of the viewing image and/or the video tap. Schneider Circular Polarizers feature a two layer design to prevent this blackout.
The first layer is made up of the same polarizing material used in all True-Pol filters; the second layer is a 1/4- wave retarder plate which effectively prevents cross-polarization.
Available in sizes:
- 10 x 10 cm (4 x 4 in)
- 10 x 14.5 cm (4 x 5.65 in)
- 16.8 x 16.8 cm (6.6 x 6.6 in)
The Schneider Group specializes in developing and producing high-Performance lenses for film and photo, cinema projection lenses, as well as industrial optics and precision mechanics. 1913 founded in Bad Kreuznach, Germany, as a mechanical shop for optical lenses, Jos. Schneider Optische Werke GmbH is today a worldwide market leader in high-quality lenses and precision engineering.