Circular Polarisers employ a two-layer design to prevent blackout of the viewing image and/or the videotap caused by the cross-polarisation of light, which occurs when a standard (linear) polarising filter is attached to the lens. The first layer is made of the polarising substance used in all True-Pol® filters. Layer two is made of a 1/4- wave retarder plate to prevent cross-polarisation. To ensure correct lens barrel placement, Schneider clearly marks the Circular True-Pol® filters’ outer surface.
- Available in various sizes: Square 4˝ x 4˝, 4˝ x 5.65˝ (Panavision size), 5˝ x 5˝, 5.65˝ x 5.65˝, 6.6˝ x 6.6˝
- Round Drop-In 138 mm