Aperture - Wikipedia, the free encyclopedia The lens aperture is usually specified as an f-number, the ratio of focal length to effective aperture diameter. A lens typically has a set of marked "f-stops" that the f-number can be set to. A lower f-number ...
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resolution - definition of resolution by the Free Online Dictionary, Thesaurus and Encyclopedia. How could she-- how could any woman--resist the influence of his steady mind, his firmness of purpose, his manly resolution to owe everything to himself and nothing to his rank, set off as these attractive qualities were by the outward and personal advant
Imagine the Universe! Dictionary If words seem to be missing from the articles, please read this. Imagine the Universe! is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NAS
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Links to documents - Welcome to the United Nations: It's Your World Links to documents - Welcome to the United Nations: It's Your World
NCSC Partners - Welcome to the National Center and State Collaborative! Welcome to the National Center and State Collaborative! The National Center and State Collaborative (NCSC) is a project led by five centers and 24 states (13 core states and 11 Tier II states) to build an alternate assessment based on alternate achievemen
F-number - Wikipedia, the free encyclopedia Aperture, shutter speed, and film sensitivity are linked: for constant scene brightness, ... 0.5, 0.7, 1.0, 1.4, 2, 2.8, 4, 5.6, 8, 11, 16, 22, 32, 45, 64, 90, 128, 180, 256.
F-number - Wikipedia, the free encyclopedia In optics, the f-number (sometimes called focal ratio, f-ratio, f-stop, or relative aperture[1]) of an optical system is the ratio of the lens's focal length to the diameter of the entrance pupil.[2] It is a dimensionless number that is a quantitative mea
Numerical aperture - Wikipedia, the free encyclopedia By incorporating index of refraction in its definition, NA has the property that it is ... 1.1 Numerical aperture versus f-number; 1.2 Working (effective) f-number.
