focusingn.

Brit.

/ˈfəʊkəsɪŋ/, U.S.

/ˈfoʊkəsɪŋ/

Forms: 1800s– focusing, 1800s– focussing.

Origin: Formed within English, by derivation. Etymons: focus v., -ing suffix¹.

Etymology: < focus v. + -ing suffix¹.

The action or result of focus v. (in various senses).

ΘΚΠ

the world > space > relative position > inclination > state or quality of being convergent > [noun] > action or fact of converging

congress1578

contracting1585

congression1611

concentration1612

concentering1641

convergence1713

convergency1794

convergement1839

focusing1844

the world > matter > physics > electromagnetic radiation > light > emission of light, radiation > [noun] > meeting point > convergence

focusing1844

the mind > attention and judgement > attention > earnest attention, concentration > [noun] > focus of attention > convergence on

concentration1612

centring1705

focusing1883

1844 R. Willis tr. R. Wagner Elements Physiol. iii. 650 An effect which is entirely due to the focussing of the microscope.

1846 J. Ruskin Mod. Painters II. 45 The right gradation or focussing of light and colour [in painting].

1881 St. G. Mivart Cat 295 The focussing of rays coming from points varying in remoteness.

1883 A. Barratt Physical Metempiric 217 Thought is the focussing of phenomena into a universe.

1914 Amer. Jrnl. Clin. Med. May 416/1 In order to correct myopia, we must apply a lens..that will delay the focusing of the rays.

1961 M. G. Say Electr. Engineer's Ref. Bk. (ed. 10) xx. 15 This simple case of electron focusing..was applied to the focusing of the electron beam in Braun tubes.

1992 J. J. Valberg Puzzle of Experience ii. iv. 83 The focusing of the mind is not like the focusing of a camera.

2006 Which Digital Camera? Mar. 78/2 Everything is automated, from exposure and white-balance to focusing, so all you have to do is press the shutter button.

Compounds

C1. General attributive. Designating devices and equipment used to bring images into focus, as focusing frame, focusing tube, etc.Recorded earliest in focusing screen at screen n.¹ 26.

ΚΠ

1852 Athenæum 23 Oct. 1130/1 (advt.) French-polished mahogany camera, with Double-action Sliding Front, Focussing Screen, and two Double Frames for paper.

1856 Mechanics' Mag. 8 Mar. 225/1 The focus is obtained in the most convenient manner, by means of a screw, the head of which projects beneath the focusing tablet.

1883 Photogr. Times July 314/1 The system has been advocated of using a plain glass instead of a ground glass in the focusing frame.

1903 Photogr. News 4 Dec. 793/1 The automatic focussing gear abolishes focussing and enables the operator to see his picture clearly when adjusting it for size.

1973 Pop. Mech. Jan. 56 Instead of a bellows close-up attachment for my single-lens reflex, I built an adjustable focusing tube—from junk parts.

2015 J. Gerlach & B. Gerlach Digital Nature Photogr. vi. 98/2 A focusing rail is a second and perhaps a better way to accomplish the focus changes.

C2.

focusing cloth n. a thick cloth attached to the rear of a view camera and drawn over the head when focusing an image in order to block out extraneous light.

ΚΠ

1852 Aide-mémoire to Mil. Sci. III. 125 It is also a very excellent rule to throw a focussing cloth over the body of the camera before raising the slide which exposes the sensitive surface.

1962 Pop. Mech. July 150 While wet plates and flash powder went out of general use generations ago, the black focusing cloth has remained and with it the age-old problem of making it stay put on the camera.

2015 R. Angier Train your Gaze (ed. 2) 266 When your head is covered with the focusing cloth, it is easy to get lost in the image.

focusing glass n. (a) a ground glass screen used to view and focus the image produced by a view camera; a focusing screen; (b) a small magnifying glass designed to be placed against the focusing screen of a camera, especially as an aid to focusing the image projected upon the screen (now rare).

ΚΠ

1850 List Prices 2 in R. J. Bingham Photogenic Manip.: Pt. I (ed. 7) It consists of a Sliding Mahogany Box..; with ground focusing glass, two dark frames for the sensitive paper, and mounted with a miniscus [sic] lens in brass mount.

1858 T. Sutton Dict. Photogr. Focussing Glass..a magnifier used for the purpose of magnifying the image on the ground glass, and enabling the operator to get it into better focus.

1917 Pop. Sci. Monthly Nov. 774/2 The class of work which calls for this kind of screen requires a focusing glass to examine the image.

1993 O. Hilton Sci. Exam. Questioned Documents (rev. ed.) 363 The final accurate focusing is done with a magnifying focusing glass placed over the clear sections of the ground glass.

2012 K. Stern Photo 1 ii. 41 Field cameras..consist of the camera front onto which a lens is attached, a bellows that allows extension and contraction of the camera, and the camera back that holds the film and the focusing glass.

focusing ring n. a ring on the body of an optical instrument, esp. a camera lens, which is rotated to focus the instrument (typically by adjusting the relative position of the lenses).

ΚΠ

1897 Official Gaz. (U.S. Patent Office) 21 Sept. 1879/2 In an opera, or similar glass, the main barrels..provided with focusing-rings.

1918 ‘Klaxon’ H.M.S. —— 44 In a flash he was at his sights, his hands on the focussing-ring and his head close up to the telescope.

2001 Nat. New Eng. Fall 45/2 As the bird approaches, the photographer constantly adjusts the focus by swiveling the focusing ring.

This entry has been updated (OED Third Edition, September 2016; most recently modified version published online June 2022).

单词	focusing
释义	focusingn. Brit. /ˈfəʊkəsɪŋ/, U.S. /ˈfoʊkəsɪŋ/ Forms: 1800s– focusing, 1800s– focussing. Origin: Formed within English, by derivation. Etymons: focus v., -ing suffix¹. Etymology: < focus v. + -ing suffix¹. The action or result of focus v. (in various senses). ΘΚΠ the world > space > relative position > inclination > state or quality of being convergent > [noun] > action or fact of converging congress1578 contracting1585 congression1611 concentration1612 concentering1641 convergence1713 convergency1794 convergement1839 focusing1844 the world > matter > physics > electromagnetic radiation > light > emission of light, radiation > [noun] > meeting point > convergence focusing1844 the mind > attention and judgement > attention > earnest attention, concentration > [noun] > focus of attention > convergence on concentration1612 centring1705 focusing1883 1844 R. Willis tr. R. Wagner Elements Physiol. iii. 650 An effect which is entirely due to the focussing of the microscope. 1846 J. Ruskin Mod. Painters II. 45 The right gradation or focussing of light and colour [in painting]. 1881 St. G. Mivart Cat 295 The focussing of rays coming from points varying in remoteness. 1883 A. Barratt Physical Metempiric 217 Thought is the focussing of phenomena into a universe. 1914 Amer. Jrnl. Clin. Med. May 416/1 In order to correct myopia, we must apply a lens..that will delay the focusing of the rays. 1961 M. G. Say Electr. Engineer's Ref. Bk. (ed. 10) xx. 15 This simple case of electron focusing..was applied to the focusing of the electron beam in Braun tubes. 1992 J. J. Valberg Puzzle of Experience ii. iv. 83 The focusing of the mind is not like the focusing of a camera. 2006 Which Digital Camera? Mar. 78/2 Everything is automated, from exposure and white-balance to focusing, so all you have to do is press the shutter button. Compounds C1. General attributive. Designating devices and equipment used to bring images into focus, as focusing frame, focusing tube, etc.Recorded earliest in focusing screen at screen n.¹ 26. ΚΠ 1852 Athenæum 23 Oct. 1130/1 (advt.) French-polished mahogany camera, with Double-action Sliding Front, Focussing Screen, and two Double Frames for paper. 1856 Mechanics' Mag. 8 Mar. 225/1 The focus is obtained in the most convenient manner, by means of a screw, the head of which projects beneath the focusing tablet. 1883 Photogr. Times July 314/1 The system has been advocated of using a plain glass instead of a ground glass in the focusing frame. 1903 Photogr. News 4 Dec. 793/1 The automatic focussing gear abolishes focussing and enables the operator to see his picture clearly when adjusting it for size. 1973 Pop. Mech. Jan. 56 Instead of a bellows close-up attachment for my single-lens reflex, I built an adjustable focusing tube—from junk parts. 2015 J. Gerlach & B. Gerlach Digital Nature Photogr. vi. 98/2 A focusing rail is a second and perhaps a better way to accomplish the focus changes. C2. focusing cloth n. a thick cloth attached to the rear of a view camera and drawn over the head when focusing an image in order to block out extraneous light. ΚΠ 1852 Aide-mémoire to Mil. Sci. III. 125 It is also a very excellent rule to throw a focussing cloth over the body of the camera before raising the slide which exposes the sensitive surface. 1962 Pop. Mech. July 150 While wet plates and flash powder went out of general use generations ago, the black focusing cloth has remained and with it the age-old problem of making it stay put on the camera. 2015 R. Angier Train your Gaze (ed. 2) 266 When your head is covered with the focusing cloth, it is easy to get lost in the image. focusing glass n. (a) a ground glass screen used to view and focus the image produced by a view camera; a focusing screen; (b) a small magnifying glass designed to be placed against the focusing screen of a camera, especially as an aid to focusing the image projected upon the screen (now rare). ΚΠ 1850 List Prices 2 in R. J. Bingham Photogenic Manip.: Pt. I (ed. 7) It consists of a Sliding Mahogany Box..; with ground focusing glass, two dark frames for the sensitive paper, and mounted with a miniscus [sic] lens in brass mount. 1858 T. Sutton Dict. Photogr. Focussing Glass..a magnifier used for the purpose of magnifying the image on the ground glass, and enabling the operator to get it into better focus. 1917 Pop. Sci. Monthly Nov. 774/2 The class of work which calls for this kind of screen requires a focusing glass to examine the image. 1993 O. Hilton Sci. Exam. Questioned Documents (rev. ed.) 363 The final accurate focusing is done with a magnifying focusing glass placed over the clear sections of the ground glass. 2012 K. Stern Photo 1 ii. 41 Field cameras..consist of the camera front onto which a lens is attached, a bellows that allows extension and contraction of the camera, and the camera back that holds the film and the focusing glass. focusing ring n. a ring on the body of an optical instrument, esp. a camera lens, which is rotated to focus the instrument (typically by adjusting the relative position of the lenses). ΚΠ 1897 Official Gaz. (U.S. Patent Office) 21 Sept. 1879/2 In an opera, or similar glass, the main barrels..provided with focusing-rings. 1918 ‘Klaxon’ H.M.S. —— 44 In a flash he was at his sights, his hands on the focussing-ring and his head close up to the telescope. 2001 Nat. New Eng. Fall 45/2 As the bird approaches, the photographer constantly adjusts the focus by swiveling the focusing ring. This entry has been updated (OED Third Edition, September 2016; most recently modified version published online June 2022). < n.1844
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