stop

stop: a unit of relative exposure used in photography. In optics, a "stop" is a ring-shaped baffle or shield used to reduce the aperture (the diameter of the opening) of a lens. In photography, the amount of light used to record the image can be controlled either by varying the aperture, by varying the length of time the shutter is open to admit light, or by some combination of these two methods. Two exposures differ by one stop if one is made with twice the light of the other; similarly, they differ by n stops if one is made with 2ⁿ times the light of the other. Since the light transmitted varies with the square of the aperture of the lens, narrowing ("stopping down") the aperture by one stop multiplies the f ratio by the square root of 2. On many cameras, aperture settings are provided, or marked on a continuous scale, with f ratios ("f stops") at successive powers of the square root of 2.

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Synonyms:

Close, close up, Be at a stand-still, come to a stand, come to a stand-still, come to a dead lock, cease progress, halt, stand still, Pause, rest, intermission / Obstruct, close up, render impassable, block, close, blockade, Cease, desist, forbear, leave off, break off, Interruption, repression, cessation, obstruction, hindrance, check / Hinder, impede, shut in, bring to a standstill, stay, check, Tarry, stay, lodge, take lodgings, have lodgings, Impediment, obstacle, obstruction / Hinder, repress, restrain, suppress, obstruct, stay, intercept, preclude, thwart, impede, interrupt, lay an embargo on, prevent, delay, Point, mark of punctuation / Leave, cease from, desist from, refrain from, leave off, make an end of, discontinue, have done with, give over / Suspend, arrest, intermit, discontinue, quiet, put an end to, end, terminate

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stop — stop … Dictionnaire des rimes
stop — [ stɔp ] interj. et n. m. • 1792 mar.; mot angl. « arrêt » A ♦ Interj. 1 ♦ Commandement ou cri d arrêt. Il « arrêta la nage en criant : “Stop !” » (Maupassant). Fig. Stop au gaspillage ! ⇒ halte. 2 ♦ Mot employé dans les télégrammes pour séparer… … Encyclopédie Universelle
stop — interj., (2, 3) stopuri s.n. 1. interj. Stai! Opreşte! ♦ (În telegrame, ca termen convenţional pentru a marca sfârşitul unei fraze) Punct! 2. s.n. Oprire bruscă a mingii, a pucului la unele jocuri sportive. 3. s.n. Semafor care reglează… … Dicționar Român
stop — or [stäp] vt. stopped, stopping [ME stoppen < OE stoppian (in comp.) < WGmc stoppōn < VL * stuppare, to stop up, stuff < L stuppa < Gr styppē, tow < IE * stewe , to thicken, contract > Gr styphein, to contract, Sans stuka,… … English World dictionary
Stop — Stop, n. 1. The act of stopping, or the state of being stopped; hindrance of progress or of action; cessation; repression; interruption; check; obstruction. [1913 Webster] It is doubtful . . . whether it contributed anything to the stop of the… … The Collaborative International Dictionary of English
stop — stop; stop·er; stop·less; stop·pa·ble; stop·page; stop·per·less; stop·per·man; stop·ping; un·stop; back·stop; non·stop; stop·per; stop·ple; stop·less·ness; un·stop·pa·bly; … English syllables
stop by — stop off, stop over, stop in or (N American) stop by To break one s journey, pay a visit to (usu with at) • • • Main Entry: ↑stop * * * ˌstop ˈby [intransitive/transitive] [ … Useful english dictionary
stop in — stop off, stop over, stop in or (N American) stop by To break one s journey, pay a visit to (usu with at) • • • Main Entry: ↑stop * * * ˌstop ˈin [intransitive] [ … Useful english dictionary
stop-go — ˌstop ˈgo adjective stop go policy/approach etc ECONOMICS a way of controlling the economy by deliberately restricting government spending for a period of time and then increasing it for a time: • The uncertainty of such stop go policies reduced … Financial and business terms
stop — I {{/stl 13}}{{stl 8}}rz. mnż I, D. u, Mc. stoppie {{/stl 8}}{{stl 7}} substancja metaliczna otrzymywana przeważnie przez stopienie dwóch lub więcej metali (niekiedy z domieszką niemetali), wytwarzana w celu uzyskania lepszych właściwości… … Langenscheidt Polski wyjaśnień
stop — ► VERB (stopped, stopping) 1) come or bring to an end. 2) prevent from happening or from doing something. 3) cease or cause to cease moving or operating. 4) (of a bus or train) call at a designated place to pick up or set down passengers. 5) Brit … English terms dictionary

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stop

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Dictionary of units of measurement

stop

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