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Racking focus
| Lens Glossary |
Racking focus is the technique of directing the attention of the viewer of video footage by shifting the focus of the lens from a subject in the foreground to a subject in the background, or vice versa.
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Foculus, i, m, латинский
Focus, английский
- Фокус; фокусировать
- That spot where the wavefront originating at a point on the source is converged to form a point image. fresnel reflection, fresnel lossesthe fraction of the incident radiation specularly reflected by an interface between two media of different refractive indices.
- As a noun, the point where rays of light meet which have been reflected by a mirror or refracted by a lens, giving rise to an image of the source. as a verb, to adjust focal length for the clearest image and smallest spot size.
- Causing light to form a point, or sharp image on the image sensor or film.
- A point through which rays of light converge or from which rays of light appear to diverge when entering or emerging from an optical system.
- 1. the point where light rays converge through a lens 2. the centre of an infection (note: the plural is foci.) verb 1. to adjust a lens until an image is clear and sharp 2. to see clearly he has difficulty in focusing on the object.
- Фокус
- N фокус | a фокусный class
- A point where converging rays or lines meet.
- The search topic selector menu from which you can select an item that an analysis focuses on.
- Position of a viewed object and a lens system relative to one another to offer a distinct image of the object as seen through the lens system. see accommodation and depth of field. focus, principal plane of: single plane actually in focus in a photographic scene.
- Position of a viewed object and a lens system relative to one another to offer a distinct image of the object as seen through the lens system. see accommodation and depth of field. focus, principal plane of: single plane in focus in a photographic scene. focusing, automatic: (1) feature of a camera whereby the lens system adjusts to focus on an object in the field of view. (2) metaphorical attribute of a borescopic instrument’s depth of field (the range of distance in focus). the depth of field is so great in the case of video borescopes that focusing is unnecessary for most applications. despite the name, no mechanism is actively adjusted. the large depth of field is due both to the small diameter of the lens aperture and to the proximity of the lens to the charge coupled device. focusing, primary: focusing by the lens of the image onto a fiber optic bundle at the tip of a probe. focusing, secondary: focusing at the eyepiece of a borescope or other optical instrument, specifically the manual refocusing needed when the viewing distance changes. footcandle (ftc): disfavored unit of illuminance, where 1 ftc = 1 lm·ft–2 = 10.76 lx. footlambert (ftl): disfavored unit of luminance, where 1 ftl = 3.426 cd·m–2.
- Position of a viewed object and a lens system relative to one another to offer a distinct image of the object as seen through the lens system. see accommodation and depth of field.1 focusing, automatic:
- Position of a viewed object and a lens system relative to one another to offer a distinct image of the object as seen through the lens system. see accommodation and depth of field.1 focusing, automatic: (1) feature of camera, usually incorporating a range finder, whereby the lens system adjusts to focus on an object in part of the field of view. (2) metaphorical attribute of a borescopic instrument’s depth of field (the range of distance in focus). the depth of field is so great in the case of video borescopes that focusing is unnecessary for most applications.1 longer depths of field are obtained by reducing the optical aperture. focusing, primary: focusing of an image by the lens onto a fiber optic bundle at the tip of a probe.1 focusing, secondary: focusing at the eyepiece of a borescope or other optical instrument, specifically the manual refocusing needed when the viewing distance changes.1 focus, principal plane of: single plane actually in focus in a photographic scene.1 foreground temperature (see instrument ambient background): temperature of the scene behind and surrounding the instrument as viewed from the target.
- Position of a viewed object and a lens system relative to one another to offer a distinct image of the object as seen through the lens system. see accommodation; depth of focus. footcandle (fc): disused unit of illuminance, where 1 fc = 1 lm/ft2 = 10.76 lx. footlambert (ftl): disused unit of luminance, where 1 ftl = 3.426 cd/m2.
Focus, латинский
Focus #, русский
Просьба всем бить цель # в первую очередь
Focus (camera), английский
To adjust the distance setting on a lens or let an automatic focus device do it for you.
Focus (light), английский
To vary a spot light`s beam size and intensity. see: flood, spot, focus range, and beam angle.
Focus (of an earthquake), английский
Focus (pl. foci), английский
Очаг (патологического процесса) также используется в более широком смысле – эпидемический очаг (focus of
Focus (yours), английский
To ignore the pandemonium around you while you light.
Focus adjustments, английский
Корректировка резкости focus chain фокусная цепочка focus control table таблица управления кадрами focused beam сфокусированный луч focused control активный элемент управления focused event активное событие focused view выбранный объект; выделенный объект focuser фокусирующее устройство focus error signal сигнал расфокусировки
Focus assist, английский
- Some cameras employ a visible or invisible (infrared) lamp to illuminate the subject so the autofocus can work in low light or total darkness.
- Cameras with this send out a light, either normal or infra red to light up the subject to assist with the autofocus in low light or darkness.
Focus error signal, английский
Focus factory, английский
A feature of lync server or office communications server that helps to manage conferences and schedule meetings.
Focus group, английский
- Фокус-группа
- A discussion group of lay people brought together under professional guidance to discuss issues such as care
- Фокусная группа; фокус-группа небольшая группа лиц, на основании беседы с которой проводится уточнение имеющихся у населения знаний по определенным вопросам здравоохранения, необходимости и возможности их изменения.
Focus group discussion, английский
- Дискуссия в составе фокус-группы метод социальной и/или санитарно-просветительской работы.
- Дискуссия в составе фокус-группы метод социальной и
Focus lock, английский
- Pre-focusing the camera and then moving it to re-compose the image before capturing it. accomplished by half-pressing the shutter button and keeping it held at that position while moving the camera to another point before pressing it all the way to capture the image.
- In autofocus camera systems, a button, lever, or push-button control that locks focus at a particular distance setting, often used when the main subject is off to the side of the frame or not covered by the autofocus brackets in the viewfinder.
- Focus lock means pre-focussing the subject and re-framing by moving the camera. this is done by half pressing the shutter to focus and fully pressing to expose. done to ensure crisp, sharp eyes for example.
Focus of control, английский
In a sequence diagram, the time period during which an object or actor is performing an action. activation is represented by a thin rectangle.
Focus of dual search unit, английский
Focus of infection, английский
- Очаг инфекции см. effective disease area (эпидемический очаг), focus (очаг), natural focus of disease (природный очаг болезни).
- Очаг инфекции см. effective disease area (эпидемический очаг), focus (очаг), natural focus of
Focus ok circuit, fok, английский
Схема контроля фокусировки луча используется в эпу с коррекцией вращения при помощи лазерного луча
Focus plane, английский
Foreground, английский
- Dark foregrounds help hold the eye within the frame and increase the illusion of depth. bright foreground objects, especially out-of-focus or moving ones, can be distracting. tip: back or side-light the foreground using little or no fill. also see: frame.
- The brush color of displayed characters and graphics, for example, the color of the text that is displayed in a textbox control.
Background, английский
- Фон
- The surface area against which the pattern is contrasted. the surface area of
- The portion of a scene that sits behind the main, foreground subject. the background can be made sharp or unsharp through the use of selective focusing techniques and depth of field manipulation.
- A фоновый; внеязыко- вой knowledge
- Sound or noise that interferes with radio or sonar reception.
- Фон, задний план о ~ for
- A page that you can assign to another page to create multiple layers in a drawing.
- In a graphical user interface such as windows, a pattern or picture in the screen background that can be chosen by the user.
- The area on a card that allows a user to make the card’s image a background when clicked on.
- The area that appears behind the tiles on the start screen.
- The color or image that appears behind the content of a visual element, for example, behind the text that is displayed in a textbox control or on your graphical user interface.
- The image that appears in the conversation window.
- The picture that appears in the photos hub.
- Formations on or signals from a test object that constitute the background to a discontinuity. the higher the level of background noise, the more difficult it is to distinguish a discontinuity. background signals may arise from visual, acoustic, chemical, electrical, or radiation sources that the sensor responds to. see also sensitivity; signal-to-noise ratio.
- Formations on or signals from a test object that constitutes the background to a discontinuity. the higher the level of background noise, the more difficult it is to distinguish a discontinuity. background signals may arise from visual, acoustic, chemical, electrical or radiation sources that the sensor responds to. see also neural acuity; sensitivity; signal-to-noise ratio.
- Formations on, or signals from, a test object that constitute the background to a discontinuity. the higher the level of background noise, the more difficult it is to distinguish a discontinuity. see also background fluorescence; neural acuity; sensitivity; signal-to-noise ratio. glossary b 491
- In magnetic particle testing, the appearance or brightness of the surrounding area acting to reduce the contrast of an indication. (2) nonrelevant signal that tends to interfere with the normal reception or interpretation of the target being sought.
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Field monitor, английский
Ranging in size from a few inches to about a foot diagonally, field monitors serve as a highly accurate alternative to the smaller viewing screens found on most video cameras and camcorders, assisting with critical focus and exposure calibration. with the advent of video capture using hdslrs, field monitors have become part and parcel of many hdslr users’ equipment inventories.
Gui (graphical user interface), английский
Pronounced "goo-ey." refers to a program interface that takes advantage of the computer`s graphics capabilities to make the program easier to use.
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