Photography Basics: Polarization Filters

The use: A polarising filter (or polarization filter) is used to remove reflections from a shiny surface and make blue skies darker. Types: Linear and circular polarizer. Circular is recommended. Manufacturers: Hoya, B&W and Cokin, using different depths of filter mount. Recommendations: not to use with wide-angle lenses and UV Filters. A polarization filter only allows light to enter the lens in a specific direction whilst absorbing other light. If used for its traditional role of removing reflections, by polarising the light reflected from the surface it permits the actual subject to be viewed without reflections. When removing reflections the optimum polarisation effect will be achieved with the camera at a 30o ~40o angle to the subject. By rotating the polarising filter different parts of the subject can often be polarised changing the overall effect. The part of the world you are photographing will also make a big difference to the … Read more

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