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Longman Dictionary of Contemporary English
a camera lens
▪ A high quality camera lens is the key to taking good photographs.
contact lens
fish-eye lens
telephoto lens
wide-angle lens
zoom lens
▪ He did not look like a businessman about to discuss optical lenses in the board room at the Zeiss works.
▪ Nikon use an optical zoom lens that has a 2.5x range.
▪ A young woman wearing glasses with thick lenses sat on a huge sack, reading a letter.
▪ One man was reading a Hebrew magazine and wore eyeglasses with thick lenses.
▪ It is also, merely, the story of a pop group but viewed through a wide angle lens.
▪ Nikon for instance produce a telephoto lens, several wide angle lenses and a fish-eye for their range of models.
▪ Hilliard's cibachrome shows a woman with her head turned away from the camera lens.
▪ The camera lens, of course, has its own inherent limitations.
▪ On a purely practical basis, the paintings in this instance work better than the camera lens.
▪ He had a momentary glimpse of himself from above, as if through a camera lens.
▪ Indifferently magnificent, it sneered back at my eager camera lens, which could only fit in a pitiful few floors.
▪ Readers interested in the deployment of experimental camera lenses and the like may get the most out of what LoBrutto offers.
▪ I can gaze seductively into a camera lens and give you that look of pure lust and desire.
▪ In either event, the script is projected on to a piece of glass located directly over the camera lenses.
▪ I then got a bad infection in my left eye which my doctor suggested was due to the contact lens.
▪ But in infant monkeys wearing an opaque contact lens, this changes.
▪ A contact lens holder - I recognized it, Mum wears them - still with the lenses in them.
▪ Amongst these are contact lens wetting solutions, comfort drops and artificial tears, which, perhaps surprisingly, have similar compositions.
▪ Unlike other soft contact lenses, they're designed so that you can sleep and wake up in them.
▪ But Tucker was fine; he had just lost a contact lens.
▪ Although spectacle lenses will correct errors, they can not replace vision that does not exist.
▪ Each spectacle lens then filters one image out, based on its color or polarity.
▪ These were made discreetly with the aid of a telephoto lens and with the full co-operation of the club.
▪ Jaq looked in vain through a lens for identification marks, badges, or names.
▪ When you looked through the jar filled with water, you were looking through a magnifying lens.
▪ Nikon use an optical zoom lens that has a 2.5x range.
▪ Elicit that they are used as lenses. 2.
▪ The technique involves the use of a micro-beam of electrons which are focused on the sample surface using electrostatic lenses.
▪ We wondered whether it might be possible to do the same thing using glasses or contact lenses.
▪ Much of this is because the changes identified in the 1960s are viewed through different historical lenses.
▪ Everything about the schools was viewed through the lens of progressive education.
▪ He said that I shouldn't wear the lenses until the infection was cleared.
▪ A young woman wearing glasses with thick lenses sat on a huge sack, reading a letter.
▪ I didn't wear the lenses for six months.
▪ But in infant monkeys wearing an opaque contact lens, this changes.
▪ One man was reading a Hebrew magazine and wore eyeglasses with thick lenses.
▪ At least you remembered to wear the lens in the right one.
▪ Kristy is the one with the green contact lenses and Kathy is the one wearing the blue lenses.
fast film/lens
▪ Minerals giving very low intensity emission, such as quartz grains, required many minutes or even hours of exposure with fast films.
▪ a 115mm zoom lens
▪ Jan wears glasses with thick lenses.
▪ Analysis Have each group use two different jars and draw what they see through the lenses as accurately as possible.
▪ And with contact lenses, who knows?
▪ I can gaze seductively into a camera lens and give you that look of pure lust and desire.
▪ I didn't wear the lenses for six months.
▪ The managers' experience was an imperfect lens with which to make sense of their new position.
▪ They are used to increase the comfort of dry eye sufferers and contact lens wearers.
▪ Travels in time through the photographer's lens.
▪ Without lenses, they can not be seeing an image.
The Collaborative International Dictionary

Lens \Lens\ (l[e^]nz), n.; pl. Lenses (-[e^]z). [L. lens a lentil. So named from the resemblance in shape of a double convex lens to the seed of a lentil. Cf. Lentil.] (Opt.) A piece of glass, or other transparent substance, ground with two opposite regular surfaces, either both curved, or one curved and the other plane, and commonly used, either singly or combined, in optical instruments, for changing the direction of rays of light, and thus magnifying objects, or otherwise modifying vision. In practice, the curved surfaces are usually spherical, though rarely cylindrical, or of some other figure. [1913 Webster] Lenses

Note: Of spherical lenses, there are six varieties, as shown in section in the figures herewith given: viz., a plano-concave; b double-concave; c plano-convex; d double-convex; e converging concavo-convex, or converging meniscus; f diverging concavo-convex, or diverging meniscus.

Crossed lens (Opt.), a double-convex lens with one radius equal to six times the other.

Crystalline lens. (Anat.) See Eye.

Fresnel lens (Opt.), a compound lens formed by placing around a central convex lens rings of glass so curved as to have the same focus; used, especially in lighthouses, for concentrating light in a particular direction; -- so called from the inventor.

Multiplying lens or Multiplying glass (Opt.), a lens one side of which is plane and the other convex, but made up of a number of plane faces inclined to one another, each of which presents a separate image of the object viewed through it, so that the object is, as it were, multiplied.

Polyzonal lens. See Polyzonal.

Douglas Harper's Etymology Dictionary

1690s, "glass to regulate light rays," from Latin lens (genitive lentis) "lentil," on analogy of the double-convex shape. See lentil. Of the eye from 1719.\n\nIn the vernacular of the photographer, anyone crowding to the front of a group, staring into the lens, or otherwise attracting attention to himself is known as a "lens louse."

["American Photography," vol. 40, 1946; the term dates from 1915]


n. An object, usually made of glass, that focuses or defocuses the light that passes through it. vb. 1 (context transitive English) To film, shoot. 2 (context geology English) To become thinner towards the edges.

  1. n. a transparent optical device used to converge or diverge transmitted light and to form images [syn: lense, lens system]

  2. genus of small erect or climbing herbs with pinnate leaves and small inconspicuous white flowers and small flattened pods: lentils [syn: genus Lens]

  3. (metaphor) a channel through which something can be seen or understood; "the writer is the lens through which history can be seen"

  4. biconvex transparent body situated behind the iris in the eye; it focuses light waves on the retina [syn: crystalline lens]

  5. electronic equipment that uses a magnetic or electric field in order to focus a beam of electrons [syn: electron lens]

Lens (optics)

A lens is a transmissive optical device that affects the focus of a light beam through refraction. A simple lens consists of a single piece of material, while a compound lens consists of several simple lenses (elements), usually along a common axis. Lenses are made from transparent materials such as glass, ground and polished to a desired shape. A lens can focus light to form an image, unlike a prism, which refracts light without focusing. Devices that similarly refract radiation other than visible light are also called lenses, such as microwave lenses or acoustic lenses.

Lens (anatomy)

The lens is a transparent, biconvex structure in the eye that, along with the cornea, helps to refract light to be focused on the retina. The lens, by changing shape, functions to change the focal distance of the eye so that it can focus on objects at various distances, thus allowing a sharp real image of the object of interest to be formed on the retina. This adjustment of the lens is known as accommodation (see also below). Accommodation is similar to the focusing of a photographic camera via movement of its lenses. The lens is more flat on its anterior side than on its posterior side.

The lens is also known as the aquula (Latin, a little stream, dim. of aqua, water) or crystalline lens. In humans, the refractive power of the lens in its natural environment is approximately 18 dioptres, roughly one-third of the eye's total power.

Lens (Pas-de-Calais)
  1. Redirect Lens, Pas-de-Calais
Lens (genus)

Lens is a genus of the legume family mostly known for its edible seeds, which are referred to as lentils. Lens contains four species of small, erect or climbing herbs with pinnate leaves, small inconspicuous white flowers, and small flattened pods. The lentil most commonly eaten is the seed of Lens culinaris.

Lens (geometry)

In 2-dimensional geometry, a lens is a convex set bounded by two circular arcs joined to each other at their endpoints. In order for this shape to be convex, both arcs must bow outwards (convex-convex). This shape can be formed as the intersection of two circular disks. It can also be formed as the union of two circular segments (regions between the chord of a circle and the circle itself), joined along a common chord.

Lens (geology)

In geology a lens is a body of ore or rock or a deposit that is thick in the middle and thin at the edges, resembling a convex lens in cross-section. Adjective: "lenticular".

A lens can also refer to an irregular shaped formation consisting of a porous, permeable sedimentary deposit surrounded by impermeable rock.

Category:Petrology Category:Sedimentology

Lens (hydrology)

In hydrology a lens is a convex layer of fresh groundwater that floats on top of denser saltwater. It arises when rainwater seeps down through a soil surface and then gathers over a layer of seawater at or down to about five feet below sealevel. Freshwater lenses are often found on small coral or limestone islands and atolls, where wells dug into them may be the only natural source of potable water.

Ghyben-Herzberg lenses are a simple model of the process.

Lens (song)

"Lens" is a song by Canadian-American recording artist Alanis Morissette, released as the second single from her eighth studio album, Havoc and Bright Lights. The song was written by Morissette and Guy Sigsworth, and produced by Sigsworth and Joe Chiccarelli. The song was played at most shows of Guardian Angel Tour.

Lens (surname)

Lens is a surname. Notable people with the surname include:

  • Louis Lens, Flemish rose breeder
  • Nicholas Lens, Belgian composer
  • Josef Lense, physicist
  • Jeremain Lens, Dutch-Surinamese footballer
Lens (film)

Lens is a psychological thriller and a hostage drama written and directed by Jayaprakash Radhakrishnan. Dealing extensively with the lust for voyeurism in the digital world and its consequences, the movie goes beyond the banal bifurcation of the hero and the nemesis. Starring Anandsami and Jayaprakash himself as the lead, the movie unfolds as an edge of the seat thriller which keeps you guessing till the last minute.

Lens has been screened in several film festivals including Chennai International Film Festival, Pune International Film Festival, Bengaluru International Film Festival and Bioscope International Film Festival in Delhi.

The film has received much critical acclaim and appreciation. Malayalam Director, Vineeth Srinivasan said "There are so many things i wanted to say about this film.. Infact, if the movie was released already, i would have written in detail.. For now, i' ll just say this.. This film needs to be seen by today's internet savvy generation. It's relevant, it's gritty, it's honest and it haunts.. I hope many people take the effort to watch this film."

Usage examples of "lens".

The next morning he had her up at daybreak to see a school of jellyfish, the shiny, throbbing bodies abob in blue water as far as the lens of a telescope would encompass.

Gently, precisely, a little aimlessly, he moved the specimen so that the edge of the drop was under his lens.

The note itself would mean nothing to anybody unless that person knew that Alsa wore contact lenses and perhaps not even then, because it was a commonplace thing to find written at the top of an article.

Game, and since all the hardware required for everything from aphotic to apochromatic lens work were and are right there in the lab off the Comm.

Those lights threw fifteen hundred watts apiece, but there was no glare-polarized lenses and windshields saw to that.

Bolex R32 digital recorder and BTL meters and lenses, including a bitching Angenieux zoom O.

If he senses me, and he surely did sense me good, it was through camera lenses and hypersound pulses and capacitance probes and thermal imagers, none of which are located anywhere near the eyes of the image of Albert.

Angelo and I were grinning and Chubby was scowling horrifically into the lens.

Some of the practitioners were willing to concede the possibility that the ciliary muscles did, in addition, change to some extent the shape of the lens.

Some of the practitioners were willing to concede the possibility that the ciliary muscles did, in addition, change to some , extent the shape of the lens.

While the greater portion of the eyeball is concerned in the focusing of light, the crystalline lens, operated by the ciliary muscle, serves as the special instrument of accommodation.

Show how the iris, the crystalline lens, the retina, the ciliary muscle, and the cornea aid in seeing.

Xerox needed to make its own toner, its own copier, its own light lens, and its own feeding and sorting subsystems in order to deliver high-volume, high-quality xerography to its customers.

Matching of Hues -- Purity and Luminosity of Colours -- Matching Bright Hues -- Aid of Tinted Films -- Matching Difficulties Arising from Contrast -- Examination of Colours by Reflected and Transmitted Lights -- Effect of Lustre and Transparency of Fibres in Colour Matching -- Matching of Colours on Velvet Pile -- Optical Properties of Dye-stuffs, Dichroism, Fluorescence -- Use of Tinted Mediums -- Orange Film -- Defects of the Eye -- Yellowing of the Lens -- Colour Blindness, etc.

There were tiny flashes of light from the darkness, and Diddy remembered tensely that Yevd communicated with each other by light beams and light energies that operated directly from a complex interrelation of organic prisms, lens, mirrors, and cell transformers.