A portion of a data set, such as seismic data, to which functions or filters are applied. Aperture time, for example, can be specified, such as a window from 1.2 to 2.8 seconds.

The diameter of the opening in pipes.

(1) Lens: The orifice, usually an adjustable iris, which limits the amount of light passing through a lens. (2) Camera: In motion picture cameras, the mask opening that defines the area of each frame [..]

Any type of opening

is the size of the opening within your lens that allows light onto the image sensor. Aperture is measured by f-number or f-stops. For more information, check out our lesson on F-stops and Aperture.

The adjustable opening—or f-stop—of a lens determines how much light passes through the lens on its way to the film plane, or nowadays, to the surface of the camera's imaging sensor. “Faster” len [..]

early 15c., from Latin apertura "an opening," from apertus, past participle of aperire "to open" (see overt).

The size of the opening through which light passes in an optical instrument such as a camera or telescope. A higher number represents a smaller opening while a lower number represents a larger opening [..]

The circular opening inside the lens that can change in diameter to control the amount of light reaching a camera's sensor or film. The diameter is expressed in numbers called f/stops; the lower [..]

Small opening, for example the opening in the test of a foram.

An opening. In pollen, an opening or potential opening in the pollen wall. See: Pollen Morphology

The camera, projector, or printer opening that controls the size and proportions of the recorded image - the Frame. See: Aspect Ratio. The area from which light is emitted from a Fixture is also an aperture and the size, among other factors, influences the Quality of the light.

n. Hole.

In a directional antenna, the portion of a plane surface very near the antenna normal to the direction of maximum radiant intensity, through which the major part of the radiation passes. 2. In an acoustic device that launches a sound wave, the passageway, determined by the size of a hole in the inelastic material and the wavelength. [After 2196]

 – A measure of the width of the opening allowing light to enter a camera.

refers to the measurement of the opening in a camera lens that regulates the amount of light passing through and contacting the film. The red highlighted portion of the lens above is the aperture, whi [..]

Opening that allows light to fall onto an instrument's optics.

A device that controls the amount of light admitted through an opening. In photography and digital photography, aperture is the unit of measurement that defines the size of the opening in the lens tha [..]

The opening in a digital camera lens where light travels through to the inside of the camera.

A variable opening inside a lens that regulates the amount of light reaching the image plane. Also known as an iris. (Camera/Lighting)

The diameter of a telescope’s main lens or mirror — and the scope’s most important attribute. As a rule of thumb, a telescope’s maximum useful magnification is 50 times its aperture in inches (or twice its aperture in millimeters).

The lens opening formed by the iris diaphragm inside the lens. Aperture Priority AE

 Literally means "opening". The camera iris; the opening which lets light through the lens. By adjusting the size of the aperture, the amount of incoming light is controlled. The aperture si [..]

The total range (in percentage) of full scale capacity over which a digital weight indicator “Automatic Zero Maintenance” (AZM) and “Push-button Auto Zero” (PAZ) functions will operate; Handbook 44. [..]

An opening or hole. Today, this word usually refers to the size of the opening in a lens that lets light into a camera.

Any opening through which radiation may pass. The diameter of an opening that admits light to a lens or

A cross sectional area of the antenna which is exposed to the satellite signal.

(n) a natural opening in something(n) an man-made opening; usually small(n) a device that controls amount of light admitted

(n.) In the case of a telescope, an area open to the Universe; signifies either the maximum physical or the effective capture cross section of a telescope or radio antenna; often stated in terms of th [..]

The small window that is either carved or cut into the dial to display various indications, including the date.

A small opening in the dial that displays certain information such as date, day, month or moon-phase.

In reference to RS-274X files, an aperture is a brush shape used to draw things. Originally, the aperture was a physical hole of a specific shape and size through which light exposed a photographic fi [..]

The size of the opening in the iris controlling the amount of light reaching the sensor. The larger the F-Stop number the less light.

The light gathering area of a lens, controlled by the iris.

The opening through which light passes to expose sensitized material or a sensor. It is usually located behind or within a lens mount, originally as removable 'stops' and later as an iris di [..]

The lens opening that allows more, or less light onto the sensor formed by a diaphragm inside the actual lens.

A cross sectional area of the antenna which is exposed to the satellite signal.

of a lens on a video camera controls the amount of light which is allowed to reach the image sensor. Aperture is listed in terms of an F-stop number. As F-stop number increases (i.e. F/1.4, F/1.8, F/2.8), the amount of light permitted to reach the image sensor decreases.

In photography, an aperture is an adjustable opening in the lens that regulates how much light passes through. Aperture controls depth of field - how much of the image, from foreground to background, [..]

The opening of a lens, the size of which is controlled by a diaphragm. The term is commonly used to designate f-stops, such as f/4, f/5.6 etc., which are actually arrived at by dividing the focal length of the lens by the diameter of the aperture. Thus, f/11 on a 110mm focal length lens means the opening is 10mm. The wider the opening, the lower th [..]

The opening in the lens through which light passes. Changing the size of this opening changes the amount of light passing through the lens.

The opening which allows light to pass through a camera lens. An adjustable diaphragm is used to control the size of the opening.

The variable opening produced by the iris-diaphragm through which light passes to the film plane. Measured in f/stops.  

An aperture is a lens opening that controls how much light reaches the film or digital sensor.  Iris adjustment controls aperture size, and a series of f-stop numbers dictate how much light passes through the lens.  A smaller aperture allows for better focus on objects outside the camera’s plane of focus.

Working much like the pupil of the eye, the movement of the lens' internal aperture blades closes or opens the aperture to adjust the amount of light passing through the lens. The value inscribed on the aperture ring of the lens (F1.4, F2, F2.8, etc.) represents the size of the aperture and is called the "aperture value" or "f-s [..]

In the camera, the aperture refers to the opening in the aperture plate which determines the size and shape of the frame. In the lens, the term aperture refers to the adjustable opening that controls the amount of light reaching the film. Some cameras will automatically read the light and adjust the aperture. Some cameras also allow the filmmaker t [..]

The aperture is the opening in the lens that controls the amount of light that passes through to the image sensor. The size of the aperture is controlled by the iris in the lens.

A hole in the lens that adjusts in diameter, similar to the way the pupil of an eye works. This controls the amount of light reaching the film or CCD to record an image. Every different diameter openi [..]

The aperture of a lens controls the amount of light which can reach the pickup device (image sensor when relating to video). The size is controlled by the iris adjustment. By increasing the F-number (F1.2, F1.8, etc), less light will be permitted into the sensor.

The opening of the lens that controls the amount of light reaching the surface of the pickup device. The size of the aperture is controlled by the iris adjustment.

(1) Lens: The orifice, usually an adjustable iris, which limits the amount of light passing through a lens. (2) Camera: In motion picture cameras, the mask opening that defines the area of each frame exposed. (3) Projector: In motion picture projectors, the mask opening that defines the area of each frame projected.

The size of the opening that lets light into a camera lens, which can usually be adjusted and changed. In a telescope, the aperture is usually fixed, and is defined by the size of the primary mirror o [..]

In television optics, it is the effective diameter of the lens that controls the amount of light reaching the photoconductive or photo emitting image pickup sensor.

An opening in a lens through which light enters. Aperture size is calibrated in f-numbers. The larger the f-number(ex.f11, f16) the smaller the opening size.

The opening of the lens which controls the amount of light reaching the surface of the pickup device. The size of the aperture is controlled by the iris adjustment.

The opening in the iris diaphragm of a lens that allows light to pass through the lens to the image sensor.

The opening of the lens which controls how much light can enter the camera.

A space where light passes through an optical or digital instrument.

The variable opening produced by the iris-diaphragm through which light passes to the film plane. Measured in f/stops.

The aperture is the opening in the lens through which the light travels to hit the image sensor (or film frame). The aperture controls the amount of light that hits the image sensor and determines that conical angle of light rays that come to a focus point on the image plane.

A measure of the width of the opening allowing light to enter the camera.

The lens opening formed by the iris diaphragm inside the lens. Aperture Priority AE

The variable diameter hole used to control the amount of light passing through a lens. See f-stop

The opening which controls how much light enters the camera and reaches the sensor. It effects how much of your subject will be focused or blurred. The aperture is adjusted by increasing or decreasing the f stop. The higher the f stop numbers the smaller the opening and more will be in focus. At F22 everything you point the lens at will be in focus [..]

The (Camera) lens opening that controls the amount of light that reaches the image sensor. Aperture is expressed as F-stop

The circular opening inside the lens that can change in diameter to control the amount of light reaching a camera's sensor or film. The diameter is expressed in numbers called f/stops; the lower [..]

A device that determines how much light is allowed to pass onto the film of a 35mm camera or onto the digital array of a digital camera while the shutter is open.

The light gathering area of a lens. The iris controls the size of the aperture.

Hole positioned concentrically with the optical axis of a lens to restrict the area of the lens through which light can pass. Usually adjustable in size, formed by an iris diaphragm. Main purpose is t [..]

The aperture of an optical system (lens) is the opening that determines the cone angle of a bundle of rays that come to a focus in the image plane.

Aperture is the opening of a camera’s shutter that opens and closes, allowing light to reach its film or sensor. The wider the aperture setting, the more light is let in. The smaller the aperture, the [..]

Lens opening. The hole or opening formed by the metal leaf diaphragm inside the lens or the opening in a camera lens through which light passes to expose the film. The size of aperture is either fixed or adjustable. Aperture size is usually calibrated in f- numbers-the larger the number, the smaller the lens opening. Aperture affects depth of field [..]

The opening of the lens through which light passes through. Aperture is measured in f-stops. The smaller the number, the larger the lens opening, and the larger the number, the smaller the opening and the less light allowed to reach the sensor. Aperture also controls depth of field, a smaller aperture (larger number) will produce maximum image shar [..]

the size of the opening of the camera’s shutter. Aperture sizes are reported in F-numbers which are inversely proportional to the aperture size, so a 5.6 aperture setting is smaller than a 4 aperture [..]

This is the area of the lens that gathers the light and the iris controls this.

Also denoted by f-number (or f/#) and f-stop. In optics, it refers to the ratio of the focal length to diameter; whereas, in imaging, it refers to the ratio of the focal length to exit pupil of the sy [..]

The opening in the camera that the light passes through; adjusting the aperture allows varying levels of light into your shots.

The opening of a lens which controls the amount of light let into the camera. The size of the aperture is controlled by the iris adjustment. By increasing the f stop number (f1.4, f1.8, f2.8, etc.) le [..]

Is the opening in a cameras lens that allows light to pass through to expose the medium. Aperture size is expressed in f/numbers and can be altered to change the final outcome of a photo. A larger f/number represents a smaller lens opening and hence less processed light.

The adjustable opening of a lens that determines how much light may pass through the lens. "Faster" lenses have wider apertures and allow for faster shutter speeds that stop motion. The wider the aperture is set, the shallower the depth of field of the image.

the opening in a camera lens through which light passes. The opening is formed by the metal leaf diaphragm inside the lens and is either fixed or adjustable. Aperture size is usually calibrated in f-n [..]

The space provided between propeller and stern post for the propeller.

Most often is in reference to the numerical aperture of a lens also known as the f-stop.

Small openings carved into the watch that display certain indications, such as the date or hour. Some apertures may only be visible when the watch dials are in certain positions.

<physics> The opening in an optical system which restricts the size of the bundle of rays incident on a given surface. (Usually circular and specified by diameter.) (09 Oct 1997)

<microscopy> The angle between the most divergent rays that can pass through a lens to form the image of an object. The angle subtended between the axis of a lens and the largest accepted angle of the image-forming rays. With microscope objectives the trigonometric sine of this angle is used to define numerical aperture but as measured from t [..]

<microscopy> The diameter of the entrance pupil: it is the apparent diameter of the limiting aperture measured from the front. (05 Aug 1998)

is a hole, gap, or slit and any other small opening. Diameter of the objective of a telescope.

The diameter in the opening of a downlight, in inches (in.). Sometimes manufacturers will round up to the next whole-inch increment.

Opening. In optical instruments, it is the size of the opening admitting light.

A small, narrow opening through which light is focused. Found in cameras, microscopes, and other devices, apertures are often adjustable in order to increase or decrease the amount of light that enter [..]

In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture and focal length of an optical system determine the cone angle of a bundle of rays that com [..]

In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture and focal length of an optical system determine the cone angle of a bundle of rays that com [..]

The aperture is an opening in certain kinds of mollusc shells: it is the main opening of the shell, where the head-foot part of the body of the animal emerges for locomotion, feeding, etc. The term ap [..]

The aperture of an optical system is the opening that limits the amount of light that can pass through. Aperture may also refer to: In science and technology: In anatomy, a number of apertures in the [..]

Aperture magazine, based in New York City, is an international quarterly journal specializing in photography. Founded in 1952, Aperture magazine is the flagship publication of Aperture Foundation.The [..]

Aperture magazine, based in New York City, is an international quarterly journal specializing in photography. Founded in 1952, Aperture magazine is the flagship publication of Aperture Foundation.The [..]

Apertures are areas on the walls of a pollen grain, where the wall is thinner and/or softer. For germination it is necessary that the pollen tube can reach out from the inside of the pollen grain and [..]

Aperture is a discontinued photo editing and management computer program developed by Apple Inc. for the macOS operating system, first released in 2005, which was available from the Mac App Store. The [..]

In computing, an aperture is a portion of physical address space (i.e. physical memory) that is associated with a particular peripheral device or a memory unit. Apertures may reach external devices su [..]

The aperture of an optical system is the opening that limits the amount of light that can pass through. Aperture may also refer to: In science and technology: In anatomy, a number of apertures in the [..]

A circle-shaped opening in a lens (a hole, really) through which light passes to strike the image sensor or the film. The aperture is usually created by an iris diaphragm that is adjustable, enabling [..]