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Circular polarizer/linear analyzer [1] filtering unpolarized light and then circularly polarizing the result. A polarizing filter or polarising filter (see spelling differences) is a filter that is often placed in front of a camera lens in photography in order to darken skies, manage reflections, or suppress glare from the surface of lakes or the sea.
Linear polarizing filters were the first types to be used in photography and can still be used for non-reflex and older single-lens reflex cameras (SLRs). However, cameras with through-the-lens metering (TTL) and autofocusing systems – that is, all modern SLR and DSLR – rely on optical elements that pass linearly polarized light. If light ...
A close-up lens is a single or two-element converging lens used for close-up and macro photography, and works in the same way as spectacles used for reading. The insertion of a converging lens in front of the taking lens reduces the focal length of the combination.
For example, using screw-on filters requires a separate set for each lens diameter, though inexpensive step-up rings can minimize this requirement. To address this issue, some manufacturers have developed variable ND filters. These filters consist of two polarizing filters, with at least one being rotatable. The rear filter blocks light in one ...
Devices that block nearly all of the radiation in one mode are known as polarizing filters or simply "polarizers". This corresponds to g 2 = 0 in the above representation of the Jones matrix. The output of an ideal polarizer is a specific polarization state (usually linear polarization) with an amplitude equal to the input wave's original ...
A range of sunglass models with lenses of different colors, for sale in New York City Different reflection characteristics and variations in glass stress are demonstrated when photographed through a polarizing lens (bottom picture).
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