n
(attributive) A six-channel surround sound audio system, having five full-bandwidth channels and one low-frequency effects channel.
n
(photography) A photograph taken from an aircraft, or by a drone remotely controlled from the ground.
n
Photographs taken by this means, collectively.
n
(historical) A kind of stereoplotter.
n
(cartography) A photograph of the ground taken from an aircraft.
n
A photograph taken from the air, for example to study terrain.
n
Specifically, a device or application which blurs an image and is often used to project a slow clarification of the blurred image into sharp focus.
n
A form of surround sound reproduction, using two or more transmission channels and four or more speakers, that attempts to reproduce directional properties of the sound
n
(astronomy, photography) The diameter of such a hole which restricts the width of the lightpath through the whole system. For a telescope, this is the diameter of the objective lens.
n
An instrument for drawing a circular arc without the use of a central point.
n
A person with an interest in high fidelity music and/or sound reproduction and its associated technology.
n
(computing theory) A system that carries out autoprojection.
n
Flat floor-mounted scales (usually stored in the bathroom) used to measure one's own weight.
n
(television) A device for producing chromakey effects.
n
An early motion picture camera using cinefilm.
n
(historical) A camera that could develop its own film and served as its own projector.
n
A slightly convex mirror, commonly of black glass, once used by artists to view landscapes and produce works similar to those of Claude Lorrain.
n
(historical) A photographic lens comprising a negative flint glass element in the centre with a crown glass element on each side.
n
An instrument for tracing the outlines of moldings.
n
(dated) A drawing instrument that combines a protractor and scale.
n
(historical) A supposed instrument designed for transmitting pictures by telegraph. It turned out the device was a hoax.
n
(photography, dated) A lens element attached to the front of a photographic lens to shorten the lens's minimum focus distance; also called a "close-up filter".
n
Alternative form of ellipsograph [A mechanical instrument used to trace out an ellipse.]
n
(photography) An optical device used to make enlarged prints from a photographic negative
n
(historical) A toy consisting of a card on which confused objects are transformed into various pictures, by causing it to revolve rapidly.
n
(electronics) An oscilloscope display of a data signal passed through a transmission line, clocked synchronously to the data symbols; used to analyze the quality of transmission.
n
(photography) A method of photography using sub-picosecond pulses of light (usually around 10⁻¹³ seconds, or 100 femtoseconds, long) to illuminate the subject of the photograph, allowing the propagation of the light pulse to be viewed directly.
n
In photography, a familiar reference object used to show size or scale, such as a ruler or a coin; a fiducial marker.
n
An opto-mechanical device for displaying motion pictures by projecting them on a projection screen (Movie projector for projection of moving images from film).
n
(photography) A wide-angle lens having an extremely wide field of view (approaching or exceeding 180 degrees) and producing images that are circular or distorted by curvature at the edges.
n
An instrument for drawing spiral lines on a plane.
n
(obsolete) A photograph representing an object in its natural colours.
v
(intransitive) To send a heliograph.
n
(obsolete) A photographer.
n
A high-quality reproduction of sound.
n
holographic foil (that displays a holographic image in natural light)
n
An instrument for tracing designs on glass.
n
(photography) A wide-angle lens, forming a flat field, constructed symmetrically with two deep meniscus elements that almost form a sphere.
n
(live concert production) image magnification . Commonly implemented with large projection screen(s) fed by live camera(s) that have selected tight/close shots (head or head/shoulders) of the presenter/host/performer, in order to allow audience members seated at great distance to see the facial expressions and body language in order to increase engagement.
n
(historical) A device used for taking colour photographs of specimens in pathology.
n
A plenoptic camera: one that uses a microlens array to capture four-dimensional information about the light rays in a scene, allowing for later refocusing etc.
n
(photography, informal) A telephoto lens.
n
(photography) A high-powered lens for long-distance filming or photography.
n
(photography) A lens that allows a camera to focus at very close range to photograph small objects.
n
(dated) A slide projector.
n
(photography) A kind of high-resolution, low-distortion, extra-wide photographic lens with a 90-degree field of view.
n
A form of kaleidoscope, especially one consisting of mirrors arranged so as by multiplied reflection from a small piece of carpet to show how it looks covering a whole floor.
n
(photography) A telephoto lens
n
Alternative form of Nipkow disk [A mechanical, geometrically-operating image scanning device, a fundamental component of early mechanical television.]
n
(photography) A lens which produces an image similar in detail and angular perspective to the view produced by the human eye, as distinct from a wide-angle lens or a telephoto lens.
n
A mechanical device for drawing the outline of a bird's egg.
n
(photography) A camera for obtaining a circular panoramic view of the horizon. The photographic plate is placed horizontally with a vertical lens above. A specially-shaped mirror reflects light from the entire horizon to the lens, by means of which it is focused upon the plate.
n
A projector that projects an image over the heads of the viewers onto a screen in front of them.
n
A device used in surveying composed of four flat, straight brass rules, two of which are long and are connected by a double pivot at the end to create a V shape, and two of which are short and joined by a double pivot to create another V shape pointed away from the first, with the other ends of the short rules connected at the halfway mark of the long rules, so that the entire figure creates a parallelogram.
n
(photography) A five-sided prism used in the viewfinder of most single-lens reflex cameras
n
The science or art of drawing in perspective.
n
(historical) A photographic lens consisting of two doublet lenses with an aperture stop in between.
n
(dated) An apparatus consisting of a large wheel with spokes, which when turning very rapidly is illuminated by momentary flashes of light passing through slits in a rotating disk. By properly timing the succession of flashes, the wheel is made to appear to be motionless, or to rotate more or less slowly in either direction.
n
(photography) A photographic enlarger
n
A light-sensitive film used in photolithography and photoengraving.
n
A handheld projector designed to project an image from a smartphone etc onto a wall
n
Alternative form of pico projector [A handheld projector designed to project an image from a smartphone etc onto a wall]
n
(cartography) A particular kind of instrument used by surveyors in mapmaking.
n
A kind of straightedge on wheels that is rolled over a surface to measure its regularity.
n
(photography) A photographic lens with a constant focal length, as opposed to a zoom lens.
n
An optical device that projects a beam of light, especially one used to project an image (or moving images) onto a screen.
n
A kind of trigonic quartz crystal, supposed to provide mystical insights into the future.
n
In a manograph, a device for reproducing the engine stroke on a reduced scale.
n
(photography, attributive) A wide-angle lens with an inverted telephoto configuration.
n
(military) An infrared homing system that extends a conical scanner with ad additional mirror or prism to create a more complex, rosette-like pattern with more angular coverage.
n
A device that projects an enlarged image of a photographic slide onto a screen
n
(electronics) single-mode fibre; a type of an optical fibre which is designed to carry only a single ray of light.
n
(photography) A secondary lens mounted between the camera and a photographic lens so as to reduce the central part of an image obtained by the objective lens while concentrating the light rays on a smaller area.
n
(military) An assembly of two cameras disposed at a fixed overlapping angle relative to each other.
n
A lamp that produces short bursts of light that synchronizes with a camera shutter for photographing fast-moving objects.
adj
(photography, of a lens) Extremely wide; panoramic.
n
(photography) A very high-magnification zoom feature.
n
A machine used to carry out this process.
n
A photograph taken through a telephoto lens.
n
(photography) A lens having a long focal length which produces a magnified view of distant objects.
v
(transitive) To photograph with a telephoto lens.
n
A photographer who uses a telephoto lens.
v
(transitive, intransitive, mathematics, of a series) To collapse, via cancellation.
n
(photography) A very high-magnification zoom feature.
n
Any optical device used to view photographic slides.
n
(historical, photography) A photograph made using a vortoscope
n
The use of mathematics and a large number of loudspeakers to accurately reproduce a given field of sound.
adj
(cinematography, photography) Of or pertaining to a short focal length lens that has an angle of view greater than about 70°; of or pertaining to an image produced with such a lens.
n
A lens screwed onto the front of an existing camera lens to give a wider field of view.
n
(photography) A short focal length lens having a wide field of view.
n
An augmentation of a view, by varying the focal length of a lens, or digitally.
n
(photography) A lens containing a mechanical assembly of inner lenses, allowing the focal length to be changed rapidly.
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