The major opening of a gastropod shell.
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.
A metal block containing a hole through which the radiation (photon or proton) beam passes. Each portal for each patient requires a custom-made aperture. The shape of the hole is the approximate shape of the target being treated by the beam. Every patient has her or his own set of apertures; no other patients use them.
A hole through which light may pass. The aperture stop is that hole in an optical system limiting the bundle of light able to traverse the system.
The opening of the shell through which the snail protrudes.
The size of the main lens or mirror (the objective) that collects light in your telescope. Common amateur telescopes might have a range of apertures from about 2.4" (60mm) to about 12 inches or larger.
A thin (100 micrometer thick) disk or strip of metal (usually Pt) with a small (2-100 micrometers) circular through-hole. Used to restrict electron beams and filter out unwanted scattered electrons before image formation.
The light gathering area of a lens, controlled by the iris.
The opening in a lens diaphragm through which light passes.
In photography, the size of hole allowing light from the lens to get through to the film. The aperture works in conjunction with the shutter to determine the amount of light that reaches the film. In Maya, aperture effects are simulated by camera settings such as filmback and filmgate.
An opening or an open space; in the case of a fireplace, the opening to the firebox or the opening between the two jambs or mantel supports
The lens opening through which light passes. Aperture size is adjusted by opening or closing the diaphragm. Aperture is expressed in f/numbers such as f/8, f/5.6 and so on.
The lens opening that lets in light. The diameter of this opening, in addition to the focal length, determines the f-stop number. The f-stop number is sometimes referred to as the aperture number, or aperture for short. F-number is focal length divided by aperture diameter. Both units are in millimeters and the resulting f-number is unit-less. Comments & Discussion
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 the f-number, the more light is let through the lens. Each step in aperture represents a halving or doubling of light. Thus, f/8 allows in half as much light as f/5.6, and twice as much light as f/11.
The diameter of a telescope's light collecting surface (either a lens or mirror).
opening of the test. It is standard procedure to figure the specimens aperture up.
An opening that admits electromagnetic radiation to a detector or film. An example would be the lens diaphragm opening in a camera.
Opening of the lens which is expressed as a fraction of the focal length ( f/stop).
The size of the lens opening through which light passes, expressed in f/stops (focal length divided by diameter of aperture).
a. adjustable opening in a camera that limits the amount of light passing through a lens. b. The diameter of such an opening, often expressed as an f number. The Aperture, Understanding Exposure
From Latin: open An optical aperture is an opening for light beams on technical devices. These light beams are usually transfered to lenses and mirrors.
the opening or gape of a shell.
An iris-like device in a lens that opens and closes to control the amount of light allowed to reach the film.
Hole in the lens through which light travels to strike the film. In most photographic lenses, the aperture size is adjustable and measured in f-stops.
This controls amount of light that goes through the lens through a variable opening.
The size of the clear opening (or hole) that collects light in your telescope. Can be expressed in inches or millimeters. Typical amateur telescopes have a range of apertures from about 3 inches to about 12 inches. Is it the most important factor in the performance of your telescope.
The diameter of the main light gathering element in a telescope.
In a real camera, aperture is the film back's width and height in millimeters. The camera aperture relates to the focal length in that different film backs have different "normal" lenses. A normal lens has a focal length that is not telephoto or wide angle. It closely approximates normal vision. As the size of the camera aperture increases, a longer focal length is required to achieve "normal" perspective. For example, a 35mm camera uses a 50mm lens as a normal lens. On a 16mm camera, the same 50mm lens appears telephoto in nature. A 25mm lens is required to achieve "normal" perspective on a 16mm camera. This can be demonstrated in Maya by changing to different film backs without changing the focal length. The camera appears to zoom in and out with different film backs even though you are not changing focal length.
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 the diameter or an equivalent diameter if the aperture is noncircular.
opening, such as a spiritual opening, called a chakra
The diameter of a telescope's primary (largest) optical surface (lens or mirror), usually expressed in inches or millimeters. Larger apertures allow the telescope to collect more light and see fainter objects.
the diameter of a telescope's main lens or mirror, and the scope's most important attribute.
the size of the lens opening through which light passes. The relative aperture is measured as the focal length of the lens divided by the diameter of the aperture; this is expresses as an f-number: f/8, f/11, etc.
An adjustable opening in a lens which affects the amount of light entering a camera. The size of the aperture is controlled by the iris adjustment and is measured in f-stops. Smaller f-stop numbers pass more light to the surface of the camera’s pickup device.
The lens opening, which permits light to expose the film in a traditional camera or the CCD (charge-coupled device) in a digital camera or camcorder. The aperture may be either fixed or adjustable and is calibrated in f-stop numbers (the higher the number, the smaller the opening). In higher-end cameras the aperture can be manually set.
Adjustable opening of lens that is used to control how much light enters the camera. It also has an effect over depth of field. Also known as an iris or diaphragm.
The effective diameter of the primary mirror or lens of a telescope.
opening or orifice of a shelled animal, through which the body may have contact with the outside.
The diameter of a parabolic antenna.
Measure of the size of the beam which reads the bar code.
An opening; in solar collectors, the area through which solar radiation is admitted and directed to the absorber.
Opening in the lens that admits light.
Diameter of a telescope objective or radio dish or antenna structure.
In a camera, the aperture is the opening through which light enters. It is analogous to the pupil of a human eye.
Opening of a fixture through which light exists.
A small opening such as a camera shutter through which light rays pass to expose film when the shutter is open.
The diameter of a lens that controls how much light can reach the sensor.
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-stop." As this value increases, the aperture narrows, or is "closed," and as it decreases, the aperture widens, or is "opened."
The diameter of the primary lens or mirror of a telescope; hence, the best single measure of the light-gathering power of a telescope.
The part of the collector through which light enters. For evacuated tubes this refers to the cross-sectional surface area of the outer clear glass tube measured using the internal diameter, not the outside diameter. (Eg. 0.0548m x 1.72m = 0.094m). 1.72m is the exposed length of the evacuated tube.
The opening in screening surface. Also know as clear opening.
The size of the opening in the diaphragm of a lens through which light passes. Also known as an f-stop. A larger aperture (smaller f-stop numbers) results in more light being let through. A smaller aperture (higher f-stop numbers) results in less light being let through. Aperture is directly related to DOF.
Also know as f-stop: A measurement of how much a cameras lens opens; one of the means by which a camera regulates the amount of light reaching the film. Apertures on a typical camera are f-2, f-2.8, f-4, f-5.6, f-8, f-11, f-16, f-22, and f-32. Each higher number, respectively, diminishes the amount of light admitted to the camera by 50%.
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.
The aperture stop of a photographic lens can be adjusted to control the amount of light reaching the film or image sensor. In combination with variation of shutter speed, the aperture size will regulate the film's degree of exposure to light. Typically, a fast shutter speed will require a larger aperture to ensure sufficient light exposure, and a slow shutter speed will require a smaller aperture to avoid excessive exposure. C - photogoraphic glossary of terms
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.
a hole or an opening She increased the size of her camera's aperture because the light was poor
Open end of the body chamber
An adjustable opening in an instrument (like a camera) that controls the amount of light that can enter.
a device that controls amount of light admitted
a natural opening in something
an man-made opening; usually small
a literal opening, straight from the Latin, while an overture (the same word) is now a figurative opening or beginning of something
an opening in a lens that limits the amount of light passing through it to the camera body
The aperture is a circular hole in the front of the camera lens. It controls the amount of light that is shed onto to the film. The sizes of the aperture holes are referred to f-stops. The smaller the f-stop, the more depth of field you will receive in a photograph.
_The cross-beam diameter of a focused beam oflight or other photon energy; also the effective diameter of alens or mirror.
The opening inside the lens that controls the amount of light that reaches the camera's sensor.
The size of the actual tens opening, expressed as a fraction of the focal length. The aperture defines the light passing power of the lens, and can be varied to control exposure.
Adjustable opening in a lens that allows light to pass through onto a pickup device. Also called an iris.
this is the opening which controls the amount of light passing through the lens. It is expressed as a fraction of the focal length, so that a lens with an aperture of f1.4 lets in more light than one with an aperture of f2.0. In general, a 'faster' lens (one with a wider maximum aperture) is better for filming in low light.
Aperature is an adjustable opening in an optical instrument that limits the amount of light passing through a lens.
The opening in a telescope that admits light.
A small opening on the dial of a watch. Usually for the indication of the day, date, month, or moon-phase.
A small opening in the dial for displaying certain information, e.g., date, day, month or moonphase.
An opening in the stencil that corresponds to a land area on the circuit board to be printed.
The small, opening inside the lens that can be changed in diameter so as to control the amount of light reaching the camera's sensor. Aperture is expressed in f-stops and the lower the number, the wider the aperture. (e.g. f/2.8 is larger than at f/8). The aperture and shutter speed together control the total amount of light reaching the sensor. A larger aperture passes more light through to the sensor.
Adjustable opening of a camera that allows light to pass through.
Small opening in the dial that displays certain information such as date, day, month, or moon phase.
The diameter of the primary light collecting element of a telescope, be it a mirror or lens.
The unobstructed diameter of the objective lens or primary mirror.
The diameter of the primary objective of your telescope.
refers to the size of the iris, the opening in the lens that determines the amount of light that passes through onto the film or sensor. If the number is larger, like f/22, the opening is smaller and allows less light to hit the film or sensor. Aperture affects exposure and depth of field. If you have a small number, the film will be less exposed and have a larger depth of field.
A hole or opening that limits the amount of infrared radiation that reaches a detector. Bullardâ€(tm)s Thermal Throttle on the TIx and TI Commander is also called an aperture control.
Also known as exposure and shutter. Exposure is the amount of light that falls on a light sensitive material. Aperture refers specifically to a device controlling the amount of light that enters a camera through its lens. A number system known as f-stops controls the aperture settings.
In stenolaemates, terminal skeletal opening of the autozooid. (Boardman & Cheetham, 1983) In ascophorans, an opening in the frontal wall not necessarily coterminous with the orifice. (Hayward & Ryland, 1979) (used rarely)
Variable opening that controls the amount of light passing through it. Size measured in 'f' stops. Large apertures [wide] such as f2.8 let in lots of light and give shallow Depth of field. Small apertures [narrow] such as f22 let in much less light but give greater Depth of field.
Size of the hole that lets the light through the lens and in to the camera..
This is the lens opening. A ‘metal leaf diaphragm' covers the hole inside the lens and this controls the amount of light which will pass to expose the film. The aperture is calibrated by an f number and effects the depth of field (ie. the sharpness of the picture). The smaller the aperture (or f number) the sharper the object will appear.
Aperture is the diameter of the light-gathering portion of a telescope.
The opening in a lens which allows light through. The size of the opening can usually be controlled and is measured in f-stops.
Created by the iris in the lens. As the iris opens the aperture increases allowing more light to pass through the lens to the CCD. Assemble Editing Used in linear tape to tape editing. Camcorder footage is transferred to the VTR scene by scene from the start to finish editing out footage not required. AVI Audio Video Interleaved is one of the two main digital video formats the other being Apple's Quicktime. Capture Card Electronic circuit board which has to be fitted in the computer (usually using a PCI slot) to enable the audiovisual data from the camcorder or VTR to be transferred to the computer. CCD The image recording chip(s) in the camcorder. Consumer camcorders normally use 1 chip whilst pro kit uses 3, one for each primary colour. The chips vary in size and the number of pixels they resolve. The larger the chip and the larger the number of pixels the better. ChromaKey Electronic process where a plain background (normally blue) is replaced by a video image. Composite Video The chrominance and luminance signals are processed together in low band systems reducing both quality and cost.
In any type of camera, light is focused by the lens, through an aperture and onto the focal plane. The size of the aperture controls how much light passes through to the focal plane. In addition to controlling the brightness of the exposure, the aperture controls the depth of field in the image. By balancing the size of the aperture (as measured in f-stops) with the shutter speed you can trade off between varying depth of field, and or the ability to better-resolve fast motion.
The opening at the front of the body chamber. This is the hole through which the head, arms and the hyponome (if present) emerged from. A peculiarity of many species of ammonite was the constriction or ornamentation of the aperture when they became fully grown. Sometimes within a Single species such modifications differed between the two dimorphs. The aperture is sometimes called the 'mouth' of the shell, although it is obviously not the mouth of the actual ammonite animal.
If you need to freeze fast-moving action or shoot in low light, look for a camera with a low aperture number. The lower the aperture number (such as f2 or f2.8), the more light the lens is capable of allowing in during a given shutter interval.
Qualitatively, any opening through which radiation, particle fluxes, liquids or gases may flow.
the opening in a spirally coiled shell through which the animal extends and into which the animal can retract (in most)
the opening in the lens that allows light in to expose the image
A small, narrow opening through which light is focused. Found in cameras, microscopes, and other devices, apertures are often adjustable so as to increase or decrease the amount of light.
An adjustable opening in a lens which, like the iris in the human eye, controls the amount of light entering a camera. The size of the aperture is controlled by the iris adjustment and is measured in f-stops. A smaller f-stop number corresponds to a larger opening which passes more light. F-stop examples are F2, F2.8, F4, F5.6, F8, F11. F-stops are logarithmic. Each stop admits 100% more light than the previous one. Many camcorders today offer automatic exposure where the iris adjustment is controlled automatically for proper lighting. Generally, there is a manual exposure override, where the light value can be adjusted. Few of today’s camcorders use f-stops as a forms of light calibration.
Also refered to as f/stop, f/value, aperture value. The size the lens opens to allow in light. A large aperture is denoted by a small number, e.g. F1.8, while a small aperture is denoted by a large number, e.g. F16. A " fast" lens is one with a large maximum aperture.
A small plate used for blocking light from the light sensitive material in a camera. The plate contains a small hole which gives the photographer the control of how much light is able to enter the camera. Back Lit When a photographed subject is lit from behind we say that the image or object is back lit.
The aperture in a camera determines how much light strikes the CCD, a small f number on the camera indicates a larger aperture, and a large f number indicates a smaller aperture. Many cameras allow you to change the f number, which corresponds to the aperture size. The f number corresponds to how big the aperture is in relation to the lens. A f/4 aperture setting means that the aperture is one quarter the size of the lens. A f/10 setting means that the aperture is one tenth the size of the lens.
An opening cut into a solid structure, as with the propeller aperture cut into the stern deadwood, rudder blade, or sternpost, to accept a centerline-mounted propeller.
In photography, lens opening or lens stop expressed as an f/number, such as f/22.
Usually controlled by a electronic iris, the aperture controls the amount of light allowed inside the camera. The larger the F-Stop number the less light.
Circular hole in front of the lens which controls the amount of light that enters the camera and reaches the film or digital CCD.
Aperture is the opening or width of a lens.
is the opening through which light enters a camera's lens. The larger the aperture, the greater the camera's sensitivity to light. Smaller apertures give greater depth of field to a picture. The aperture setting is called the f-stop. The smaller the aperture, the higher the f-number (f8 and up). The aperture setting must be balanced against the shutter speed . The faster the shutter speed, the larger the aperture must be.
The adjustable opening in a camera lens that -like an eye's iris- controls the amount of light that reaches the film or digital sensor. The size of such aperture is called the f-stop, like f/2.8
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.
The measurement of the diameter of the main lens of an optical system.
The opening of such letters as C, S, e. (Compare bowl, counter, eye.)
Iris in lens which restricts amount of light reaching film
Opening that allows light to fall onto an instrument's optics.
The opening in the front of a camera lens that controls the amount of light that will reach the film. The size of the aperture can be changed depending upon the amount of light needed.
A relatively large opening on the last-formed chamber of a foraminiferal shell.
An opening or hole in the gastropod shell.
The opening, usually an adjustable iris, which controls the amount of light passing through a lens. In motion picture cameras, the mask opening that defines the area of each frame exposed. In motion picture projectors, the mask opening that defines the area of each frame projected.
the opening in a camera lens through which light passes; measured in f-stops.
The opening in the lens that controls how much light hits the camera's image sensor. The aperture is an iris in the lens that can be opened or closed to allow more or less light into the camera. The smaller the aperture the less light it allows to enter through the lens. This is one of the ways a camera regulates exposure.
Opening through which light passes in the lens of a camera
A small opening through which the electromagnetic radiation pass.
The opening of a 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. By increasing the F-stop number (F/1.4, F/1.8, F/2.8, etc.) less light is permitted to pass to the pickup device.
The iris opening in a lens that regulates the amount of light passing into the camera. The size of the aperture opening determines the amount of light that will get to the imager. The larger the opening, the more light that enters. Aperture is usually signified in f/stops.
The active part of the transducer that emits and/or receives ultrasound waves. Resolution and near field size can be directly related to the aperture; with increasing aperture size, the near field can be longer, thereby improving the axial resolution.
The area of the stage that is available for projecting an image. Usually comes in the following sizes: 10“ X 10”, 10.5” X 10.5” and 11.25” X 11.25” (A4).
The opening in an optical system that establishes the field of view.
The aperture is a measurement for the size of the opening of the lens. This size is alterable in small steps. The higher the aperture value the less light gets into the camera.
Aperture is the area of the camera lens that gathers light. The Iris of the cctv lens controls the size of aperture.
Mechanism behind the lens that controls the amount of light entering the camera. The aperture not only influences picture brightness but also regulates depth of focus. Most cameras are equipped with an iris aperture that can be freely adjusted or set according to pre-selected values.
The diameter of an optical system. In a telescope, it is usually designated as the diameter of the objective (first) lens of the telescope.
opening to the shell from which the snail's body emerges
Light passes through the opening in a camera's lens to expose the film or CCD sensor in the case of digital. The size of aperture is either fixed (usually only fixed on cheaper consumer level cameras) or adjustable. The size of the aperture is indicated in f-numbers, the larger the number, the smaller the lens opening. Essentially aperture is the ratio of the diameter of the opening to the focal length of the lens. A large aperture is indicated by a small numerical f-number. The smaller the aperture, the greater is the zone of sharpness, the bigger the aperture, the zone of sharpness is reduced. Adjusting the aperture controls affects depth of field and the amount of light entering the camera, prevents vignetting and reduces lens aberrations.
The light gathering area of a lens. The iris controls the size of the aperture.
Measure of the width of the opening allowing light to enter a camera. The apparent diameter of a lens viewed from the position of the object against a diffusely illuminated background is called the "effect aperture". The ratio of focal length of a lens to its "effective aperture" for an object located at infinity is called the "relative aperture", or "f/stop". Higher apertures allow more light to enter a camera, hence darker scenes can be recorded. Conversely, lower apertures allow less light to enter, but have the advantage of creating a large depth of field.
A hole. The circular hole in the centre of a lens through which light passes to reach the film. The size of the hole can be varied using the aperture control which in turn alters a diaphragm within the body of the lens. Measured in f-stops. Altering by one F-stop either halves or doubles the amount of light reaching the film.
The opening in a lens that allows light to reach the film. Changing the size of the aperture changes the amount of light allowed to strike the film. This is measured in f-stops, or f-numbers, which are numbers written around the lens. F-stops closer to the number 1, such as f2 or f4, indicate a large aperture (and more light), whereas f-stops farther away from the number 1, such as f16 or f22, indicate a smaller aperture (and less light).
In an extrusion die, the shaped opening through which the heat-softened metal is forced and which gives the extruded product its cross-sectional shape. Also called the orifice.
the opening at the rear of a lens (measured in f-numbers) which controls the amount of light passing through though to the CCD chip. When the camcorder is in automatic mode it is coupled to the AE (autoexposure) system which enlarges or reduces the aperture's size according to the amount of light required to produce a theoretically correctly exposed picture.
The lens opening, expressed in what is called an "f" number (or f/stop). The f number is the number of times the diameter of the aperture divides into the focal length of the lens. i.e.: f/2, f/2,8/, f/4, f/5,6, f/8, f/11, f/16, f/22, f/32. In this example, as you move from f/2 to f/2,8, the amount of light, thus the diameter of the diaphragm opening (iris), is reduced. In our example, each consecutive number halves the amount of light that penetrates into the camera, e.g. f/2,8 cuts in half the amount of light allowed by an aperture of f/2. The same applies between f/4 and f/2,8 or between f/16 and f/11. The main thing to remember: The higher the number, the smaller the amount of light that hits the film.
A physical opening that is part of the optical path in a device such as a scanner, photometer, or camera. Most apertures are circular, but they may be rectangular or elliptical.
An opening or hole through which radiation or matter may pass.
Effective Aperture: The apparent diameter of a lens viewed from the position of the object against a diffusely illuminated background, such as a sky. Picture Aperture: The rectangular opening in a metal plate at which each frame of the motion picture film is situated during exposure, printing, or projection. Relative Aperture: The ratio of the focal length of a lens to its effective aperture for an object located at infinity. See f/number.
A small, circular opening inside the lens that can change in diameter to control the amount of light reaching the camera's sensor as a picture is taken. The aperture diameter is expressed in f-stops; the lower the number, the larger the aperture. For instance, the aperture opening when set to f/2.8 is larger than at f/8. The aperture and shutter speed together control the total amount of light reaching the sensor. A larger aperture passes more light through to the sensor. Many cameras have an aperture priority mode that allows you to adjust the aperture to your own liking. See also shutter speed.
This is basically a small hole in the camera lens. The light passes through this hole to reach the film. Most apertures are adjustable so you can let in more or less light to the film. The size of the aperture on a camera is expressed as in numbers such as '/8 or '/11. You can set the aperture manually or automatically on most automatic cameras.
The lens opening that controls the amount of light reaching the pickup device (imager).
circular hole in the front of the camera lens which controls the amount of light allowed to pass on to the film.
The opening formed by an iris diaphragm in the lens that controls the amount of light allowed to expose film or digital sensor.
Opening in a metal stencil or mesh screen.
This is a circular hole in front of the lens which controls the amount of light which is allowed to reach the film. This hole is variable, on all but the cheapest cameras and is measures in 'f' stops / numbers.
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.
An opening on a card that acts as a window/door.
A small hole in a disk of metal. The hole allows electrons from the beam to pass through to the sample, while the metal disk stops random and scattered electrons which are not required for image formation.
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.
Small opening, for example the opening in the test of a foram.
Opening that allows light to pass through a lens. While most cameras and enlargers use an adjustable aperture as one control of light, objective lenses in microscopes do not have such adjustments. Instead, microscope objectives have a fixed aperture.
The opening in a lens through which light passes to expose the film. Aperture size is usually calibrated in f-numbers, the larger the number, the smaller the lens opening, therefore the slower the shutter must be! (see f-stop)
An opening or hole through which matter or radiation may pass.
A physical constraint that limits the diameter of axial light passing through a lens. Affects the light transmission capability of a lens, may be adjustable and controlled by an iris. Expressed as an F-Stop number, the lower the number the greater the transmission of light.
A description of the shape and size of the gerber tool used to create a pad or track.
the opening in a lens that allows light into a camera
The opening in an optical system used by scanners, sensors, and other devices to establish the field of view.
An opening (usually in the camera lens) through which light passes.
The aperture of a camera controls how much light is passed on to the film or digital array while the shutter is open. The less the number, the more light. The aperture also controls other optical factors, such as depth of field and sharpness.
The opening in an ophthalmic frame into which a lens is inserted. Aperture dimensions (in millimeters) do not include the depth of the bevel groove. That principal meridian which contains only the spherical power component of a spherocylinder lens.
The lens opening, which permits light to expose the CCD on a digital camera or film (in a traditional camera). The aperture size is either fixed or adjustable, and is calibrated in F-Stop numbers; the larger the number, the smaller the lens opening.
The measurement of the opening in a lens of a camera that allows a specific amount of light to be let in.
The aperture is the opening formed by the blades of the iris or diaphragm in the lens, through which light passes to expose the film. Aperture size is usually given in f-numbers, the larger the number, the smaller the opening. Aperture size together with shutter speed determine the amount of light falling on the film (exposure). The aperture is sometimes called the “stop”.
This is the shape and size of the tool which draws or flashes pads or tracks respectively. The early vector plotters created tracks and pads by shining a light through selected apertures in a wheel, which was indexed over photographic film. Each aperture is referred to as a "D" code, the term arising from the adapted original machine NC language where it meant "drill"tool. Photographic films are now plotted using laser raster plotters, where all the shapes and sizes are produced in software, and there is no limitation of a mechanical wheel.
The diameter of the objective lens or mirror of a telescope; measured in inches or millimeters.
The lens opening formed by the iris diaphragm inside the lens. The size is variable and is adjusted by the aperture control.
A small opening in a plate or sheet. In cameras, the aperture is usually variable in the form of an iris diaphragm and regulates the amount of light which passes through the lens to the film.
An opening through which radiation can pass.
hole, gap, slit, or other opening
A mechanism designed to regulate the flow of light through an adjustable opening. More or less light will reach the CCD-Element (digital camera) or film (analogue camera) depending on the size of the aperture opening. The opening is adjusted using aperture values; the lowest value (e.g. f2.8) gives the largest aperture opening, whilst the largest value (e.g. f16) gives a smaller opening.
A camera's aperture works like the iris of your eye, expanding and contracting to adjust the amount of light which passes through. The smaller the aperture, the less light it admits. As a result, aperture settings are directly related to exposure, permitting you to control the amount of light admitted. Some cameras offer manual aperture adjustment; others offer an aperture priority mode for changing exposure settings.
The opening in a lens through which light passes to expose the image sensor or the film with analogue camera. The size of the aperture hole is referred to f-stops. The larger the f-stop number, the smaller the lens opening, and the more depth of field you will receive in a photograph. Also the larger the f-stop number, the slower the shutter must be.
A circle-shaped opening in a lens (a hole, really) through which light passes to strike the film. The aperture is usually created by an iris diaphragm that is adjustable, enabling the aperture to be made wider or narrower, thereby letting in more or less light. The size of the aperture is expressed as an '-number, like '/8 or '/11.
The aperture in a camera controls how much light is exposed to the sensor when a picture is taken. Click on aperture for more information.
A small opening in a dial plate through which various information is displayed: date, hours, day of the week.
The opening through which laser radiation can pass
An opening in an optical system that limits the amount of light passing through the system.
The aperture of a lens, is the area that allows the light to pass into the lens. Lenses with large apertures allow more light in than lenses with small apertures.
The opening of the telescope or binocular that collects light. Often called the diameter and measured in mm. The most important feature of a telescope.
of a telescope The diameter of the main mirror or lens in a telescope. The larger the aperture, the more powerful the telescope.
In photography, lens opening or lens stops expressed as an f/no. Such as f/22.
The aperture is the adjustable opening inside your camera lens that lets light pass onto your film or in a digital camera onto the CCD sensor. Like the pupil in your eye bigger apertures let in more light when it's dark and smaller apertures let in less light when it is bright. Aperture values are described in f numbers.
An opening; this term is used interchangeably with f-stop to denote a camera's diaphragm opening.
In an optical instrument, the opening of a lens or aperture stop.
1. The size of a lens opening. 2. A mechanical part attached to a lens used to restrict the size of a lens opening.
Lens opening. 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.
Of a camera, the adjustable opening through which light passes to reach the film. The diameter of the aperture determines the intensity of light admitted. The pupil of a human eye is a self-adjusting aperture.
The aperture is the opening in the lens that accepts the amount of light let in by the shutter and transfers it to the image sensor.
The opening in the front of the camera lens through which light passes to expose the film. Aperture size is usually calibrated in f-numbers, the larger the number, the smaller the lens opening, therefore the slower the shutter must be.
The clear opening between wires on a wire mesh screening surface.
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 and measured by an f-number. The higher the f number the less light is permitted to pass into the camera. For example, a f1.2 lens will allow more light to reach the sensor and produce a brighter image than an f2.0 lens.
In context of photography or machine vision, aperture refers to the diameter of the aperture stop of a photographic lens. The aperture stop can be adjusted to control the amount of light reaching the film or image sensor.
the opening in a photographic lens that admits the light
Most often is in reference to the numerical aperture of a lens also known as the f-stop.
A term that relates to how much light enters the camera through the shutter. Measured in f-stops, the smaller the f-stop number, the more light that is admitted.
The f-stop, or the size of the shutter opening.
an opening, as a hole, gap, or slit.
The opening in the scanner through which the reflected light exits to "read" the bar code.
an iris in the lens which can cut off the outside portions of the lens, rendering them inactive. Aperture values on the aperture ring represent the focal length of the lens divided by the diameter of the aperture.
The diameter of the lens, which controls the amount of light that reaches the photoconductive image sensor.
in photographic exposure, "aperture" refers to the iris in the lens, which opens or closes to allow more or less light into the camers. In image scanning, "aperture" refers to the size of the spot that scans the image.
Size of the lens opening through which light passes. All lenses are marked with basically the same set of numbers, although there are differences in where the sequence starts and finishes - (1.2/1.4/1.8or2) 2.8 4 5.6 8 11 16 22 (32 64 etc). These are known as f-numbers or f-stops. Each number represents half and double the amount of light represented by the numbers of either side of it. For example: f8 lets through half as much light as f5.6 and twice as much as f11 (smaller f-number = more light).
Small opening. The dials of some watches (in French: montres ? guichet) have apertures in which certain indications are provided (e.g. the date, the hour, etc).
Some watch dials have small openings, called apertures, in which certain indications (such as the date, hour, etc.) are provided.
An opening in a stencil or screen.
The lens opening formed by the iris diaphragm inside the lens. The size of the hole can be made larger or smaller by the autofocus system or a manual control.
A hole or opening limits the amount of radiation used by an optical system. The aperture of a system may be set by the size of the lens or window bounding the cross section of the radiation bundle.
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.) less light is permitted to pass into the camera.
In photography, the camera lens opening and its relative diameter. Measured in f-stops, such as f/8, f/ I 1, etc. As the number increases, the size of the aperture decreases, thereby reducing the amount of light passing through the lens and striking the film.
The diameter of an opening; the diameter of the primary lens or mirror of a telescope.
the adjustable opening in a camera or microscope that lets in the light.
Lens opening. The opening in a camera lens through which light passes to expose the film. The size of aperture is either fixed, as in a reflex or catadioptric lens, or adjustable. The aperture size controls depth of field. The smaller the aperture used (e.g.: f/22, f/16 or f/11) the greater the depth of field.
usually narrow opening, slit, or crack.
A predetermined shape (round, square, oblong, etc.), size (width, diameter), and type (draw or flash) that is exposed on artwork film by a photoplotter.
A small hole. Usually with reference to a camera, the aperture is the hole in a camera that allows light to hit film. The amount of light that gets through the aperture determines what a picutre will look like.
An opening or space between bones or within a bone.
The opening in a camera that lets in light. The aperture opens and closes when the shutter is released.
The aperture is the hole through which light enters the camera. Combined with the shutter speed, the aperture controls the exposure of the film or sensor. Aperture is measured in f-stops. Smaller apertures (larger f-stops) tend to give a deeper depth of field.
Opening, hole, gap. The opening in a camera or telescope, which allows light into the lens.
The opening in the lens controlled by a series of small, metal blades. This gives you control of the amount of light coming in through the lens as well as your depth of field.
A variable opening that controls the quantity of light that passes through a camera lens and reaches the digital sensor (CCD or CMOS) or film. The wider the opening, the more light passes through. The aperture size is expressed as an f-stop or F/number. The larger the F/number, the smaller the aperture. The aperture size also affects an image’s depth of field.
In optics, an aperture is a hole or an opening through which light is admitted. More specifically, the aperture of an optical system is the opening that determines the cone angle of a bundle of rays that come to a focus in the .
Aperture is the opening in the shell of a gastropod, through which the snail emerges. This opening can be closed, in most cases, by an operculum.