filter factor
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Filter factor — In photography, filter factor refers to the multiplicative amount of light a filter blocks.Converting between filter factors and stopsThe table below illustrates the relationship between filter factor, the amount of light that is allowed through… … Wikipedia
filter factor — noun : a number by which the normal exposure time must be multiplied to compensate for the use of a color filter with a given photographic material and source of illumination * * * Photog. a number indicating the increased exposure that a… … Useful english dictionary
filter factor — Photog. a number indicating the increased exposure that a particular film should receive when a photograph is taken using a particular filter. [1920 25] * * * … Universalium
Filter factor — Кратность светофильтра … Краткий толковый словарь по полиграфии
filter — filterer, n. /fil teuhr/, n. 1. any substance, as cloth, paper, porous porcelain, or a layer of charcoal or sand, through which liquid or gas is passed to remove suspended impurities or to recover solids. 2. any device, as a tank or tube,… … Universalium
Filter design — is the process of designing a filter (in the sense in which the term is used in signal processing, statistics, and applied mathematics), often a linear shift invariant filter, which satisfies a set of requirements, some of which are contradictory … Wikipedia
Filter capacitor — Filter capacitors are any capacitors used for filtering. Filter capacitors are common in electrical and electronic work, and cover a number of applications, such as: * Glitch removal on dc power rails * Radio frequency interference (RFI) removal… … Wikipedia
Filter feeder — [ left|thumb|200px|Krill feeding under high phytoplankton concentration (slowed down by a factor of 12).] Filter feeders (also known as suspension feeders) are animals that feed by straining suspended matter and food particles from water,… … Wikipedia
Warm filter — A warm filter is a photographic filter that improves the color of all skin tones and absorbs blue cast often caused by electronic flash or outdoor shade. Adds warmth to pale, washed out flesh tones and are ideal for portraits as they smooth… … Wikipedia
Elliptic filter — An elliptic filter (also known as a Cauer filter, named after Wilhelm Cauer) is an electronic filter with equalized ripple (equiripple) behavior in both the passband and the stopband. The amount of ripple in each band is independently adjustable … Wikipedia
Power factor — For other uses, see Power factor (pistol). The power factor of an AC electric power system is defined as the ratio of the real power flowing to the load over the apparent power in the circuit,[1][2] and is a dimensionless number between 0 and 1… … Wikipedia
