Walimex pro Circular Polarizing Filter MC 58mm

Use

The polarising filter is still one of the most frequently used filters in photography. Polarising filters only allow the light of a certain oscillation plane to pass through. All other light rays are filtered out. This filtering results in a reduction of reflections on glass and water surfaces or paintwork. At the same time, the polarising filters increase colour saturation and enhance contrast. Objects behind glass (shop windows, car windscreens) become visible again. For landscape shots, the polarising filter has its maximum effect at a shooting angle of 90 degrees 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 polarisation of the sky light.

How it works

Circular and linear polarising filters work according to the same principle. Optical gratings on the filter foil ensure that only linear light waves whose alignment matches that of the grating reach the lens. In contrast to a linear polarising filter, the circular polarising filter has an additional Lamda/4 plate. This plate is responsible for splitting the linear light rays previously created in the polarising filter back into all components and placing them at an angle of 90 degrees to each other. At the same time, one component is delayed by a quarter of a wavelength. This means that all polarisation directions are available again behind the filter. As a result, the autofocus problems often caused by polarising filters do not occur with circular polarising filters.

Excellent workmanship

The circular polarising filter has outstanding optical properties. The multi-coated, high-quality glass lens is embedded in a precisely manufactured metal frame. The rotatable filter runs precisely and stops at the desired setting. It is transported in a protective cover, which protects the filter from harmful UV radiation and significantly increases its service life.