单词 | in focus |
释义 | > as lemmasin focus Phrases P1. to bring to a focus and variants: (a) Optics to cause (rays of light, sound waves, etc.) to converge to a single point or place; (b) figurative to draw together (thoughts, ideas, resources, etc.); (also) to make clear or evident.For to bring into focus: see Phrases 2. ΘΚΠ the mind > attention and judgement > attention > earnest attention, concentration > fix the attention, concentrate [verb (transitive)] > implant, fix > at central point concentrate1632 concentricate1647 to bring to a focus1730 focus1807 polarize1868 the world > matter > physics > electromagnetic radiation > light > emission of light, radiation > radiate or transmit light [verb (transitive)] > bring to a focal point condense1787 focalize1827 to bring to a focus1860 focus1870 1730 W. Cheselden Anat. Human Body (ed. 4) App. ii. 348 By which the rays cannot be brought into a Focus upon the Retina. 1750 C. Fleming Devout Laugh 5 Your sight would have been corrected by church optics, a reconciling medium of vision, that brings into one focus, and an indissoluble union, the world and the church. a1790 B. Franklin Autobiogr. (1981) iii. 94 The bringing all these scatter'd Counsels thus into a Focus. 1837 E. Bulwer-Lytton Athens II. v. ii. 471 Athens..drew into a focus all the Grecian intellect. 1860 J. Tyndall Glaciers of Alps ii. xxiv. 354 The place where the rays were brought to a focus behind the lens. 1875 W. S. Jevons Money (1878) 252 The transactions of many different individuals..are brought to a focus. 1904 F. Rolfe Hadrian VII 34 He brought the argument to a focus with these words, ‘George Arthur Rose, I summon you to offer yourself to me.’ 1957 A. Efron Basic Physics I. xi. 149/1 A lens-shaped balloon filled with carbon dioxide will transmit and concentrate a beam of sound, bringing it to a focus. 1977 Harper's Mag. Dec. 42/2 The whole pulsing life of the nation is brought to a focus. 2002 R. Villard Large Telescopes 12 The first telescopes used glass lenses..to bend faint starlight and to bring it to a focus, where all the light beams come together. P2. in focus. a. Optics and Photography. With reference to an optical image or photograph of something: sharply defined, clear. With reference to an optical instrument or camera: adjusted so as to produce a sharply defined image. Also similarly into focus. ΘΚΠ the world > physical sensation > sight and vision > visibility > [adverb] > clearly visible > sharply or distinctly brightlyOE clearlyc1300 fairc1390 vively1537 bremely1577 in focus1785 sharply1817 trenchantly1873 eidetically1929 1785 W. Herschel in Philos. Trans. (Royal Soc.) 75 63 Double [star]... Hardly visible, and like a star not in focus. 1831 Trans. Soc. Arts 48 415 By bringing first one surface, then the other into focus, the thickness of the lens is ascertained. 1890 W. E. Woodbury Encycl. Photogr. 295 After a certain distance all objects will be in focus. 1914 R. A. Freeman Uttermost Farthing ii. 75 I applied my eye to the instrument and brought the objective into focus. 1950 J. S. Redding Stranger & Alone xxx. 306 Every part of the picture was there and in focus, timeless, changeless. 1992 L. Tuttle Lost Futures 310 She gazed uncomprehending for a few moments before her eyes brought it into focus. 2007 Play: N.Y. Times Sports Mag. June 10 For..the other images in the portfolio, he used a tilt-shift lens, which puts only a small part of the frame into focus. 2016 Mint (Nexis) 6 Feb. We want to have photos with just the food really in focus. b. figurative. Clearly defined or understood; (also) as an object of attention or concentration; as a subject of discussion or debate; under scrutiny. Also similarly into focus. ΚΠ 1834 11th Rep. Commissioners Inq. Excise Establishm. App. xix. 219 in Parl. Papers 1835 XXX. 169 No theoretic plan will be searching enough..to take in all the varieties of account, all the diverse ramifications which will have to be brought into focus at the Treasury. 1891 Sunday at Home 9 May 442/1 So world-embracing, for the geography of the time, were the military campaigns of the greater Pharaohs..that the study of their pictorial walls at Thebes is really a story of the old world in focus. 1906 G. Santayana Life of Reason V. vii. 189 In dialectic,..we strive to clarify and develop the essence of what we find, bringing into focus the inner harmonies and implications of forms. 1975 H. S. Thompson Let. 12 Aug. in Fear & Loathing in Amer. (2000) 646 One of the things that is definitely not in focus for me right now is what I plan to do about ‘covering’ the '76 campaign. 1991 Canada Lutheran Nov. 5/3 It is my confidence that as long as we keep Jesus clearly in focus, he will guide us. 2003 Book May 67/2 (advt.) This Master of the Universe struggles to keep the big picture in focus. 2009 New Yorker 23 Feb. 54/3 It threw into focus the terrible divide that occurred between the world of my mother's first husband and the world of the second. P3. Optics and Photography. out of focus: (with reference to an optical image or photograph of something) poorly defined, blurry; (with reference to an optical instrument or camera) adjusted in a way which produces a poorly defined image. Also figurative (cf. in focus at Phrases 2b). Cf. out-of-focus adj. and n. at out of prep. Compounds 3. ΚΠ 1786 C. Herschel Let. 2 Aug. in Philos. Trans. 1787 (Royal Soc.) 77 2 The object in the center is like a star out of focus,..and I suspect it to be a comet. 1814 Philos. Mag. 44 463 A fixed star, when the telescope is put out of focus, should always appear..as a truly round circle of fire with a black spot exactly in its centre. 1894 H. Drummond Lowell Lect. Ascent of Man vi Evolution was given to the modern world out of focus. 1937 W. H. Auden in W. H. Auden & L. MacNeice Lett. from Iceland 21 A bunch of photographs, Some out of focus, some with wrong exposures. 1967 R. Rendell Wolf to Slaughter (1970) iii. 29 He turned round and his opalescent eyes seemed to go out of focus. 2005 R. Fisk Great War for Civilisation ix. 363 Bill and Peggy together by the car, slightly out of focus, a picture that must have been taken by me. P4. depth of focus n. Optics and Photography (with reference to a lens or lens system) (a) the distance between the nearest and farthest objects which may be simultaneously brought into focus or (with reference to an image or photograph) which are judged to be in focus; (also) the capacity for simultaneously bringing into focus objects at different distances; (b) the distance between the two extreme positions behind a lens at which an image may be judged to be in focus.In sense (a) perhaps with reference to sense 5e; depth of field (at field n.1 14c) is now often preferred in this sense. ΘΚΠ the world > physical sensation > sight and vision > optical instruments > lens > [noun] > qualities of lenses power1673 refracting angle1676 resolution1831 depth of focus1852 astigmatism1859 aplanatism1869 apochromatism1887 covering power1895 coverage1936 asphericity1944 parfocality1955 1852 Mass. Reg. 328/1 Our panorama of Boston proves the perfection of our instrument. The depth of focus is from the steeple of Park-street Church to the lower Light House and Nahant Hotel. 1857 Jrnl. Photogr. Soc. 21 Dec. 114/2 I certainly believe in the existence of a quality I call depth of focus, and that certain lenses possess it to a much greater extent than others. 1888 Photogr. News 15 June 382/2 T. Sebastian Davis said that depth of focus, as generally understood, was..the amount of play which the focussing screen might have without losing definition. 1939 K. Henney & B. Dudley Handbk. Photogr. iv. 90 A useful accessory included on most miniature cameras and on many larger cameras is a depth-of-field, or depth-of-focus, table. 1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) II. 431/1 There may be some latitude in focusing in which there is no apparent change in sharpness. This distance is known as the depth of focus. 2005 K. Malkiewicz & M. D. Mullen Cinematogr. (ed. 3) i. 20/2 Unlike depth of field, depth of focus actually decreases for wide-angle prime lenses. 2013 Cambr. Evening News (Nexis) 17 May The aperture you use will have to give enough depth of focus so that the reflected image will also be sharp. < as lemmas |
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