For a polarizing filter to work, polarizing light is required. Light waves can, just like water waves, move in different directions. The light from the sun or a lamp consists of light rays that vibrate in different directions at the same time. This is called unpolarized light. Light rays that move in one direction are called linearly polarizing light.
Polarizing effects cannot be recreated in an image editing program
With a polarization filter from B+W, not only color saturation and contrast in the image is increased. Thanks to the fact that reflections in different materials such as glass, stone, water, etc., are filtered out, the camera's sensor can register the object's structure and color. The effect of a polarizing filter cannot be replicated in Photoshop or other image editing software. B+W Polarization filter can be used for both still image and video/film.
B+ W Polarization filter has a foil, with a structure reminiscent of a very fine "grid", laminated between two glass sheets. This "grid" is invisible to the eye, and only allows light moving (vibrating) in parallel with the grid to pass. Light that is perpendicular to the grid is completely filtered out, while light that moves in other directions can to some extent pass.
When light is reflected from a surface, a polarization of the light occurs. The degree of polarization depends on the propagation of the angle from which the light varies depending on the nature of the material. Light reflected from a water surface has a maximum polarization below 37 degrees, while reflection from glass is below 32 degrees. Wood, grass, plastic and varnishes also polarize light. Only untreated metal surfaces reflect light disorder.
With the help of a correctly positioned polarization filter, light reflections can be completely eliminated under ideal conditions. This occurs when the angle of illumination and the camera's subject angle are almost equal and the angle of maximum polarization is between 30-40 degrees. The effect of a B + W polarization filter can be observed through the viewfinder when rotating the front ring on the polarization filter
The polarization filter, which consists of a polarizing foil laminated between two optical glass filters, is mounted in a filter holder that can be rotated to obtain the desired effect.
Many filter manufactures place the polarizing foil between two glasses that means a risk of moisture leakage and air bubbles. Note that B+W laminates the foil to both glass surfaces, which prevents leakage. This increases the optical quality, light transmission and significantly reduces the risk of unwanted effects
Image without filter:
Same image with filter:
With a polarizing filter mounted on the lens and rotated for the desired effect, the contrast is increased and the colors stand out clearly. Maximum effect is reached at about 90 ° shooting angle to the sun.
Bild 2 with polarization filters mounted on the lens and rotated for the desired effect, the reflections are significantly minimized:
For more than 90 years, B+W filters have been synonymous with quality and innovation. B+W has succeeded in establishing itself as one of the world‘s leading filter manufacturers. It has, for example, made decisive progress in surface coating. B+W is the first filter manufacturer in the world to offer MRC (Multi Resistant Coating). MRC nano coating is the most innovative development in thin-layer technology. The world-famous Käsemann type polarizing filter with its outstanding quality has been produced by B+W since 1989.