Logo
Unionpedia
Communication
Get it on Google Play
New! Download Unionpedia on your Android™ device!
Free
Faster access than browser!
 

Aperture

Index Aperture

In optics, an aperture is a hole or an opening through which light travels. [1]

80 relations: Acutance, Angle of view, Angular resolution, Antenna aperture, Aperture priority, APS-C, Astronomy, Astrophotography, Barry Lyndon, Bellows (photography), Bokeh, Camera lens, Canon EF lens mount, Canon MP-E 65mm f/2.8 1–5x Macro, Cardinal point (optics), Cinema Products Corporation, Collimated light, Condenser (optics), Cornea, Cosina Voigtländer, Critical focus, Deep focus, Depth of field, Diameter, Diaphragm (optics), Entrance pupil, Exit pupil, Exposure (photography), F-number, Film format, Film grain, Film plane, Film speed, Focal length, Focus (optics), Group f/64, Half-frame camera, Human eye, Illuminance, Image circle, Image plane, Image sensor, Iris (anatomy), Large format, Lens (optics), Lens speed, Lensbaby, Light, Lyot stop, Macro photography, ..., Micro Four Thirds system, Mirror, Numerical aperture, Objective (optics), Optical aberration, Optical microscope, Optics, PDF, Pentax Spotmatic, Photographic film, Photography, Photometry (astronomy), Pinhole camera, Pupil, Ray (optics), Sampling (signal processing), Shallow focus, Shutter speed, Single-lens reflex camera, Sony Cyber-shot DSC-RX10, Stanley Kubrick, Star, Telephoto lens, Telescope, Through-the-lens metering, Tilt–shift photography, Vignetting, Z-scan technique, 135 film, 35 mm equivalent focal length. Expand index (30 more) »

Acutance

In photography, the term "acutance" describes a subjective perception of sharpness that is related to the edge contrast of an image.

New!!: Aperture and Acutance · See more »

Angle of view

In photography, angle of view (AOV) describes the angular extent of a given scene that is imaged by a camera.

New!!: Aperture and Angle of view · See more »

Angular resolution

Angular resolution or spatial resolution describes the ability of any image-forming device such as an optical or radio telescope, a microscope, a camera, or an eye, to distinguish small details of an object, thereby making it a major determinant of image resolution.

New!!: Aperture and Angular resolution · See more »

Antenna aperture

In electromagnetics and antenna theory, antenna aperture, effective area, or receiving cross section, is a measure of how effective an antenna is at receiving the power of electromagnetic radiation (such as radio waves).

New!!: Aperture and Antenna aperture · See more »

Aperture priority

Aperture priority, often abbreviated A or Av (for aperture value) on a camera mode dial, is a setting on some cameras that allows the user to set a specific aperture value (f-number) while the camera selects a shutter speed to match it that will result in proper exposure based on the lighting conditions as measured by the camera's light meter.

New!!: Aperture and Aperture priority · See more »

APS-C

Advanced Photo System type-C (APS-C) is an image sensor format approximately equivalent in size to the Advanced Photo System "classic" negatives of 25.1×16.7 mm, an aspect ratio of 3:2.

New!!: Aperture and APS-C · See more »

Astronomy

Astronomy (from ἀστρονομία) is a natural science that studies celestial objects and phenomena.

New!!: Aperture and Astronomy · See more »

Astrophotography

Astrophotography is a specialized type of photography for recording photos of astronomical objects, celestial events, and areas of the night sky.

New!!: Aperture and Astrophotography · See more »

Barry Lyndon

Barry Lyndon is a 1975 British-American period drama film by Stanley Kubrick, based on the 1844 novel The Luck of Barry Lyndon by William Makepeace Thackeray.

New!!: Aperture and Barry Lyndon · See more »

Bellows (photography)

In photography, a bellows is the accordion-like, pleated expandable part of a camera, usually a large or medium format camera, to allow the lens to be moved with respect to the focal plane for focusing.

New!!: Aperture and Bellows (photography) · See more »

Bokeh

In photography, bokeh (— also sometimes pronounced as) is the aesthetic quality of the blur produced in the out-of-focus parts of an image produced by a lens.

New!!: Aperture and Bokeh · See more »

Camera lens

A camera lens (also known as photographic lens or photographic objective) is an optical lens or assembly of lenses used in conjunction with a camera body and mechanism to make images of objects either on photographic film or on other media capable of storing an image chemically or electronically.

New!!: Aperture and Camera lens · See more »

Canon EF lens mount

Introduced in 1987, the EF lens mount is the standard lens mount on the Canon EOS family of SLR film and digital cameras.

New!!: Aperture and Canon EF lens mount · See more »

Canon MP-E 65mm f/2.8 1–5x Macro

The MP-E 65mm Macro f/2.8 is a photographic lens that was released in September 1999 and is manufactured by Canon for use on the EOS photographic system.

New!!: Aperture and Canon MP-E 65mm f/2.8 1–5x Macro · See more »

Cardinal point (optics)

In Gaussian optics, the cardinal points consist of three pairs of points located on the optical axis of a rotationally symmetric, focal, optical system.

New!!: Aperture and Cardinal point (optics) · See more »

Cinema Products Corporation

Cinema Products Corporation was an American manufacturer of motion picture camera equipment.

New!!: Aperture and Cinema Products Corporation · See more »

Collimated light

Collimated light is light whose rays are parallel, and therefore will spread minimally as it propagates.

New!!: Aperture and Collimated light · See more »

Condenser (optics)

A condenser is an optical lens which renders a divergent beam from a point source into a parallel or converging beam to illuminate an object.

New!!: Aperture and Condenser (optics) · See more »

Cornea

The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber.

New!!: Aperture and Cornea · See more »

Cosina Voigtländer

Cosina Voigtländer refers to photographic products manufactured by Cosina under the Voigtländer name since 1999.

New!!: Aperture and Cosina Voigtländer · See more »

Critical focus

In a photograph, the area of critical focus is the portion of the picture that is optically in focus.

New!!: Aperture and Critical focus · See more »

Deep focus

Deep focus is a photographic and cinematographic technique using a large depth of field.

New!!: Aperture and Deep focus · See more »

Depth of field

In optics, particularly as it relates to film and photography, the optical phenomenon known as depth of field (DOF), is the distance about the Plane of Focus (POF) where objects appear acceptably sharp in an image.

New!!: Aperture and Depth of field · See more »

Diameter

In geometry, a diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle.

New!!: Aperture and Diameter · See more »

Diaphragm (optics)

In optics, a diaphragm is a thin opaque structure with an opening (aperture) at its center.

New!!: Aperture and Diaphragm (optics) · See more »

Entrance pupil

In an optical system, the entrance pupil is the optical image of the physical aperture stop, as 'seen' through the front of the lens system.

New!!: Aperture and Entrance pupil · See more »

Exit pupil

In optics, the exit pupil is a virtual aperture in an optical system.

New!!: Aperture and Exit pupil · See more »

Exposure (photography)

In photography, exposure is the amount of light per unit area (the image plane illuminance times the exposure time) reaching a photographic film or electronic image sensor, as determined by shutter speed, lens aperture and scene luminance.

New!!: Aperture and Exposure (photography) · See more »

F-number

The f-number of an optical system (such as a camera lens) is the ratio of the system's focal length to the diameter of the entrance pupil.

New!!: Aperture and F-number · See more »

Film format

A film format is a technical definition of a set of standard characteristics regarding image capture on photographic film, for either stills or filmmaking.

New!!: Aperture and Film format · See more »

Film grain

Film grain or granularity is the random optical texture of processed photographic film due to the presence of small particles of a metallic silver, or dye clouds, developed from silver halide that have received enough photons.

New!!: Aperture and Film grain · See more »

Film plane

A film plane is the area inside any camera or image taking device with a lens and film or digital sensor upon which the lens creates the focused image.

New!!: Aperture and Film plane · See more »

Film speed

Film speed is the measure of a photographic film's sensitivity to light, determined by sensitometry and measured on various numerical scales, the most recent being the ISO system.

New!!: Aperture and Film speed · See more »

Focal length

The focal length of an optical system is a measure of how strongly the system converges or diverges light.

New!!: Aperture and Focal length · See more »

Focus (optics)

In geometrical optics, a focus, also called an image point, is the point where light rays originating from a point on the object converge.

New!!: Aperture and Focus (optics) · See more »

Group f/64

Group f/64 was a group founded by seven 20th-century San Francisco photographers who shared a common photographic style characterized by sharp-focused on and carefully framed images seen through a particularly Western (U.S.) viewpoint.

New!!: Aperture and Group f/64 · See more »

Half-frame camera

A half-frame camera is a camera using a film format at half the intended exposure format.

New!!: Aperture and Half-frame camera · See more »

Human eye

The human eye is an organ which reacts to light and pressure.

New!!: Aperture and Human eye · See more »

Illuminance

In photometry, illuminance is the total luminous flux incident on a surface, per unit area.

New!!: Aperture and Illuminance · See more »

Image circle

The image circle is the cross section of the cone of light transmitted by a lens or series of lenses.

New!!: Aperture and Image circle · See more »

Image plane

In 3D computer graphics, the image plane is that plane in the world which is identified with the plane of the monitor.

New!!: Aperture and Image plane · See more »

Image sensor

An image sensor or imaging sensor is a sensor that detects and conveys the information that constitutes an image.

New!!: Aperture and Image sensor · See more »

Iris (anatomy)

In humans and most mammals and birds, the iris (plural: irides or irises) is a thin, circular structure in the eye, responsible for controlling the diameter and size of the pupil and thus the amount of light reaching the retina.

New!!: Aperture and Iris (anatomy) · See more »

Large format

Large format refers to any imaging format of 4×5 inches (102×127 mm) or larger.

New!!: Aperture and Large format · See more »

Lens (optics)

A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction.

New!!: Aperture and Lens (optics) · See more »

Lens speed

Lens speed refers to the maximum aperture diameter, or minimum f-number, of a photographic lens.

New!!: Aperture and Lens speed · See more »

Lensbaby

Lensbaby is a line of camera lenses for SLR cameras that combine a simple lens with a bellows or ball and socket mechanism for use in special-effect photography.

New!!: Aperture and Lensbaby · See more »

Light

Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum.

New!!: Aperture and Light · See more »

Lyot stop

A Lyot stop is an optic stop, invented by French astronomer Bernard Lyot, that reduces the amount of flare caused by diffraction of other stops and baffles in optical systems.

New!!: Aperture and Lyot stop · See more »

Macro photography

Macro photography (or photomacrography or macrography, and sometimes macrophotography), is extreme close-up photography, usually of very small subjects and living organisms like insects, in which the size of the subject in the photograph is greater than life size (though macrophotography technically refers to the art of making very large photographs).

New!!: Aperture and Macro photography · See more »

Micro Four Thirds system

The Micro Four Thirds system (MFT or M4/3) is a standard released by Olympus and Panasonic in 2008, for the design and development of mirrorless interchangeable lens digital cameras, camcorders and lenses.

New!!: Aperture and Micro Four Thirds system · See more »

Mirror

A mirror is an object that reflects light in such a way that, for incident light in some range of wavelengths, the reflected light preserves many or most of the detailed physical characteristics of the original light, called specular reflection.

New!!: Aperture and Mirror · See more »

Numerical aperture

In optics, the numerical aperture (NA) of an optical system is a dimensionless number that characterizes the range of angles over which the system can accept or emit light.

New!!: Aperture and Numerical aperture · See more »

Objective (optics)

In optical engineering, the objective is the optical element that gathers light from the object being observed and focuses the light rays to produce a real image.

New!!: Aperture and Objective (optics) · See more »

Optical aberration

Aberration in optics refers to a defect in a lens such that light is not focused to a point, but is spread out over some region of space, and hence an image formed by a lens with aberration is blurred or distorted, with the nature of the distortion depending on the type of aberration.

New!!: Aperture and Optical aberration · See more »

Optical microscope

The optical microscope, often referred to as the light microscope, is a type of microscope that uses visible light and a system of lenses to magnify images of small subjects.

New!!: Aperture and Optical microscope · See more »

Optics

Optics is the branch of physics which involves the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it.

New!!: Aperture and Optics · See more »

PDF

The Portable Document Format (PDF) is a file format developed in the 1990s to present documents, including text formatting and images, in a manner independent of application software, hardware, and operating systems.

New!!: Aperture and PDF · See more »

Pentax Spotmatic

The Pentax Spotmatic refers to a family of 35mm single-lens reflex cameras manufactured by the Asahi Optical Co.

New!!: Aperture and Pentax Spotmatic · See more »

Photographic film

Photographic film is a strip or sheet of transparent plastic film base coated on one side with a gelatin emulsion containing microscopically small light-sensitive silver halide crystals.

New!!: Aperture and Photographic film · See more »

Photography

Photography is the science, art, application and practice of creating durable images by recording light or other electromagnetic radiation, either electronically by means of an image sensor, or chemically by means of a light-sensitive material such as photographic film.

New!!: Aperture and Photography · See more »

Photometry (astronomy)

Photometry is a technique of astronomy concerned with measuring the flux, or intensity of an astronomical object's electromagnetic radiation.

New!!: Aperture and Photometry (astronomy) · See more »

Pinhole camera

A pinhole camera is a simple camera without a lens but with a tiny aperture, a pinhole – effectively a light-proof box with a small hole in one side.

New!!: Aperture and Pinhole camera · See more »

Pupil

The pupil is a hole located in the center of the iris of the eye that allows light to strike the retina.

New!!: Aperture and Pupil · See more »

Ray (optics)

In optics a ray is an idealized model of light, obtained by choosing a line that is perpendicular to the wavefronts of the actual light, and that points in the direction of energy flow.

New!!: Aperture and Ray (optics) · See more »

Sampling (signal processing)

In signal processing, sampling is the reduction of a continuous-time signal to a discrete-time signal.

New!!: Aperture and Sampling (signal processing) · See more »

Shallow focus

Shallow focus is a photographic and cinematographic technique incorporating a small depth of field.

New!!: Aperture and Shallow focus · See more »

Shutter speed

In photography, shutter speed or exposure time is the length of time when the film or digital sensor inside the camera is exposed to light, also when a camera's shutter is open when taking a photograph.

New!!: Aperture and Shutter speed · See more »

Single-lens reflex camera

A single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured.

New!!: Aperture and Single-lens reflex camera · See more »

Sony Cyber-shot DSC-RX10

The Sony Cyber-shot DSC-RX10 is a digital superzoom bridge camera made by Sony.

New!!: Aperture and Sony Cyber-shot DSC-RX10 · See more »

Stanley Kubrick

Stanley Kubrick (July 26, 1928 – March 7, 1999) was an American film director, screenwriter, and producer.

New!!: Aperture and Stanley Kubrick · See more »

Star

A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.

New!!: Aperture and Star · See more »

Telephoto lens

In photography and cinematography, a telephoto lens is a specific type of a long-focus lens in which the physical length of the lens is shorter than the focal length.

New!!: Aperture and Telephoto lens · See more »

Telescope

A telescope is an optical instrument that aids in the observation of remote objects by collecting electromagnetic radiation (such as visible light).

New!!: Aperture and Telescope · See more »

Through-the-lens metering

In photography, through-the-lens (TTL) metering refers to a feature of cameras whereby the intensity of light reflected from the scene is measured through the lens; as opposed to using a separate metering window or external hand-held light meter.

New!!: Aperture and Through-the-lens metering · See more »

Tilt–shift photography

Tilt–shift photography is the use of camera movements on small- and medium-format cameras, and sometimes specifically refers to the use of tilt for selective focus, often for simulating a miniature scene.

New!!: Aperture and Tilt–shift photography · See more »

Vignetting

In photography and optics, vignetting (vignette) is a reduction of an image's brightness or saturation toward the periphery compared to the image center.

New!!: Aperture and Vignetting · See more »

Z-scan technique

In nonlinear optics z-scan technique is used to measure the non-linear index n2 (Kerr nonlinearity) and the non-linear absorption coefficient Δα via the "closed" and "open" methods, respectively.

New!!: Aperture and Z-scan technique · See more »

135 film

135 is photographic film in a film format used for still photography.

New!!: Aperture and 135 film · See more »

35 mm equivalent focal length

In photography, the 35 mm equivalent focal length is a measure that indicates the angle of view of a particular combination of a camera lens and film or sensor size.

New!!: Aperture and 35 mm equivalent focal length · See more »

Redirects here:

Apature, Aperature, Aperture Stop, Aperture factor, Aperture stop, Apertures, Clear aperture, Lens aperture, Optimal aperture.

References

[1] https://en.wikipedia.org/wiki/Aperture

OutgoingIncoming
Hey! We are on Facebook now! »