The polarizing filter is one of the most commonly used filters in photography. Polarizing filters allow only light of a certain vibrational plane to pass through, filtering out all other light rays. This results in a reduction of reflections on glass and water surfaces, as well as on painted surfaces. At the same time, polarizing filters increase color saturation and enhance contrast, making objects behind glass, such as shop and car windows, more visible.

In landscape photography, the polarizing filter achieves its maximum effect when shooting at a 90-degree angle to the sun. For a uniform effect in the image, the focal length should not be less than 35 or 28 mm in 35 mm format due to the uneven polarization of sky light. Both circular and linear polarizing filters operate on the same principle. Optical gratings on the filter ensure that only linear light waves matching the orientation of the grating reach the lens.

Unlike linear polarizing filters, circular polarizing filters include an additional Lambda/4 plate, which splits the linear light rays created in the polarizing filter back into all their components and arranges them at a 90-degree angle to each other. One component is delayed by a quarter wavelength, allowing all polarization directions to be present behind the filter. As a result, autofocus problems often caused by polarizing filters do not occur with circular polarizing filters.

The circular polarizing filter boasts excellent optical properties. The multi-coated, high-quality glass lens is embedded in a precisely manufactured metal mount. The rotatable filter operates smoothly and stops at the desired setting. It comes with a protective cover that shields the filter from harmful UV radiation, significantly increasing its service life.