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B&W Pol circular MRC 77 E

B&W Pol circular MRC       77 E (44844)

B&W Pol circular MRC 77 E

SKU:
44844
EAN:
4012240448449
  • Type Filter
Lýsing

Highly efficient standard circular polarizing filter for all cameras with beam splitters in the light paths of their TTL exposure meter and with autofocus lenses. Circular polarization has the same pictorial effect as linear polarization, but allows for proper exposure metering and/or autofocus distance settings.

B+W Polarizers increase color saturation and reduce reflections. The neutral gray color and plane parallel polarizer material guarantee optimal image results. High-quality optical glass ensures excellent pictorial quality. The filter factor varies according to how the filter is positioned in relation to the sun. Filter factor is between 2.3 and 2.8.

MRC (Multi-Resistant Coating) by B+W is not only an extraordinarily effective multiple layer coating, it is also harder than glass, so that it protects filters from scratches (for instance when cleaning the filters), and it is also water and dirt repellent, thus facilitating filter maintenance.

Linear and circular polarizers both consist of a linear polarizer foil but differ in their construction in the following way. Modern SLR cameras have have a beam-splitting prism that sends part of the incoming light to the meter and part to the viewfinder. The effect is that the light entering the meter is partially polarized by the beam-splitter. A linear polarized placed on the lens of such a system will act as a second polarizer and block light to the meter by a degree dependent on the angle between the prism and the polarizer on the lens. The result is incorrect exposure/aperture values from the meter. The circular polarizer circumvents this problem through the addition of a 1/4-wave retarder, or delay, foil. This ensures that the linearly polarized light is changed into a rotation that appears unpolarized to the meter, resulting in proper exposure/aperture readings.

Hóast vit gera okkara ítasta til tess at veita nøktandi kunning, so eru myndirnar bert vegleiðandi, og vøran sjálv er ikki endiliga 100% eins vorðin sum vísta myndin. Tól og annað kunnu verða víst við eykaútgerð, sum ikki hoyrir uppí, ella í øðrum skapi ella liti. Um so er, at munur er millum vørulýsingina og myndina, er tað vørulýsingin, ið geldur. Eru tygum í iva, setið tygum so í samband við okkum. Vit taka fyrivarni fyri prentvillum, prísbroytingum og vørulýsingum uttan fyrivarning.