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2. Photographic filter - Wikipedia

   en.wikipedia.org/wiki/Photographic_filter

   From Wikipedia, the free encyclopedia. Camera accessory consisting of an optical filter. Four photographic filters (clockwise from top-left): an infrared hot mirrorfilter, a polarizing filter, and a UV filter. The larger filter is a polarizerfor Cokin-style filter mounts. In photographyand cinematography, a filteris a cameraaccessory consisting ...

3. List of photographic equipment makers - Wikipedia

   en.wikipedia.org/wiki/List_of_photographic...

   Keystone (126 and 110 cameras with built-in flash, movie cameras) Kiron Lenses. Konica. Konishiroku (see Konica Minolta) Konica Minolta (as of 2006 may still manufacture on an OEM basis for Sony) Leitz (formerly owned Leica) Leidolf. Lord see Okaya.

4. Polarizing filter (photography) - Wikipedia

   en.wikipedia.org/wiki/Polarizing_filter...

   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. Since reflections (and sky-light) tend to be at least partially linearly-polarized, a linear polarizer ...

5. Full-spectrum photography - Wikipedia

   en.wikipedia.org/wiki/Full-spectrum_photography

   Full-spectrum photography is a subset of multispectral imaging, defined among photography enthusiasts as imaging with consumer cameras the full, broad spectrum of a film or camera sensor bandwidth. In practice, specialized broadband/full-spectrum film captures visible and near infrared light, commonly referred to as the "VNIR".

6. Wratten number - Wikipedia

   en.wikipedia.org/wiki/Wratten_number

   Wratten number. Wratten numbers are a labeling system for optical filters, usually for photographic use comprising a number sometimes followed by a letter. The number denotes the color of the filter and its spectral characteristics, and these numbers can be grouped into broad categories, but the numbering system is arbitrary within a group and ...

7. Optical filter - Wikipedia

   en.wikipedia.org/wiki/Optical_filter

   Coloured and neutral-density filters. An optical filter is a device that selectively transmits light of different wavelengths, usually implemented as a glass plane or plastic device in the optical path, which are either dyed in the bulk or have interference coatings. The optical properties of filters are completely described by their frequency ...