relative aperture

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relative aperture

(Miscellaneous Technologies / Photography) Photog the ratio of the equivalent focal length of a lens to the effective aperture of the lens; written as f/n, f:n, or fn, where n is the numerical value of this ratio and is equivalent to the f-number

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aperture diaphragm stop f-number f-system			2] - NCU Where C = circle of confusion diameter, nun S = far depth of field limit, mm R = near depth of field limit, mm U = focused distance of subject, mm F = focal length of lens, mm N = relative aperture The total depth of field is given as T = S - R From an examination of these expressions it is readily apparent that depth of field is a function of aperture, lens focal length, circle of confusion diameter, and focused distance of subject. A closer look at depth of field by Piros, Wesley E. / PSA Journal Designed to achieve an excellent compromise between the demands for high sensitivity (the lens' maximum relative aperture is f 1. Canon Expands Its Line of Pro-Video Lenses for Professional, ... by Business Wire As the focal length of the lens increases as it is zoomed, the relative aperture value of a given physical opening (effective aperture) decreases. Zoom lenses by Holden, T.T. / PSA Journal			Relapsing relapsing fever relata relate related related to Relatedness Relater relateral tell relatiative relating relation relation back relational relational adjective relational database relational database management system relationism Relationist relations relationship relationship marketing Relationships relative relative altitude relative aperture relative atomic mass relative bearing relative biological effectiveness relative clause relative density relative frequency relative humidity relative incidence relative majority relative molecular mass relative permeability relative permittivity relative pitch relative pronoun relative quantity Relative refractive index relative temperature scale Relative term relative to Relative velocity relative-in-law relatively Relativeness relativise relativism			relative relative relative Relative Absorption Factor Relative abundance relative accommodation Relative Accuracy Test Relative Accuracy Test Audit Relative acted on behalf, took proceeds of property sale Relative Adabas Block Numbers Relative address Relative Afferent Pupillary Defect relative age Relative Air Flow Relative air humidity Relative air humidity Relative air humidity Relative Air Speed relative altitude Relative Amount to Sulfur relative amplitude of accommodation relative amplitude of accommodation relative amplitude of accommodation relative amplitude of accommodation relative amplitude of accommodation relative analgesia relative analgesia relative analgesia Relative Angle Change Relative Aortic Valve Area relative aperture Relative Area Under Disease Progress Curve Relative Area under the Absorption Curve Relative Area Under the Lesion Expansion Curve Relative Arrival Time Technique relative atomic mass relative atomic mass relative atomic mass relative atomic mass relative atomic masses relative atomic masses relative attachment level relative attenuation Relative Average Deviation relative azimuth relative bandwidth Relative Based Value Units Scale Relative bearing Relative bearing Relative bearing Relative bearing indicator relative binding affinity Relative BioAvailability of Zinc relative biologic effectiveness relative biologic effectiveness relative biologic effectiveness relative biologic effectiveness of radiation relative biologic effectiveness of radiation relative biologic effectiveness of radiation relative biological effectiveness relative biological effectiveness

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