speed of lens

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• Lens speed — refers to the maximum aperture diameter, or minimum f number, of a photographic lens. A lens with a larger maximum aperture (that is, a smaller minimum f number) is a fast lens because it delivers more light intensity (illuminance) to the focal… …   Wikipedia

• speed — [spēd] n. [ME sped < OE spæd, wealth, power, success, akin to spowan, to prosper, succeed < IE base * spēi , to flourish, expand > SPACE, SPARE] 1. the act or state of moving rapidly; swiftness; quick motion 2. a) the rate of movement or …   English World dictionary

• speed — ► NOUN 1) the rate at which someone or something moves or operates. 2) rapidity of movement or action. 3) each of the possible gear ratios of a bicycle. 4) the light gathering power or f number of a camera lens. 5) the duration of a photographic… …   English terms dictionary

• speed — speedful, adj. speedfully, adv. speedfulness, n. speedingly, adv. speedingness, n. speedless, adj. /speed/, n., v., sped or speeded, speeding. n. 1. rapidity in moving, going, traveling, proceeding, or performing; swiftness; celerity: the …   Universalium

• Speed Graphic — Produced by Graflex in Rochester, New York, the Speed Graphic is commonly called the most famous press camera. Although the first Speed Graphic cameras were produced in 1912, production of later versions continued until 1973… …   Wikipedia

• Speed Grapher — Infobox animanga/Header name = Speed Grapher caption = ja kanji = スピードグラファー ja romaji = Supīdo Gurafā genre = Drama, Mystery, Psychological, SupernaturalInfobox animanga/Anime director = Kunihisa Sugishima studio = Gonzo licensor =… …   Wikipedia

• Lens Speed — WikiV The ability of a lens to transmit light, represented as the ratio of the focal length to the diameter of the lens. The largest lens opening (smallest f number) at which the lens can be set. A fast lens transmits more light and has a larger… …   Audio and video glossary

• speed — [[t]spid[/t]] n. v. sped speed•ed, speed•ing 1) rapidity in moving, traveling, performing, etc.; swiftness 2) relative rate of motion or progress: the speed of light[/ex] 3) aum a gear ratio in a motor vehicle or bicycle 4) pht a) the sensitivity …   From formal English to slang

• speed — n. & v. n. 1 rapidity of movement (with all speed; at full speed). 2 a rate of progress or motion over a distance in time (attains a high speed). 3 a a gear appropriate to a range of speeds of a bicycle. b US or archaic such a gear in a motor… …   Useful english dictionary

• lens speed —    The largest lens opening (smallest f number) at which a lens can be set. A fast lens transmits more light and has a larger opening than a slow lens. Is a measure of the light gathering power of a lens …   Forensic science glossary

• speed — I. noun Etymology: Middle English spede, from Old English spēd; akin to Old High German spuot prosperity, speed, Old English spōwan to succeed, Latin spes hope, Lithuanian spėti to be in time Date: before 12th century 1. archaic prosperity in an… …   New Collegiate Dictionary