Contact lenses articles

Omega is the name of various medium-format cameras and enlargers. The Simmon Brothers, known for their line of enlargers, built the original Simmon Omega cameras in the United States. These rangefinder cameras took 6×7cm photographs on 120 roll film. Later, Konica manufactured the Koni Omega line. The last models, including the Rapid Omega 200, came from Mamiya. This line had interchangeable lenses, including a 58 (or 60) mm wide-angle, a 90 mm normal lens, a 135 mm portrait lens, and a 180 mm telephoto. A close-up adapter was popular with wedding photographers.

Another line, the Omegaflex, was a twin-lens reflex camera. Its lenses and accessories were not interchangeable with those from the Omega line. The Omegaflex took 6×7 rectangular pictures on 120 roll film.

Backs: The Omegaflex film holder interchanges with the Omega M, 100 (Press 2 in Japan) and 200, and permits mid-roll changes on the Omegaflex, M, and 200. The earlier Koni Omega Rapid (Press in Japan) film holder is not compatible with the above, and does not permit mid-roll changes.

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Contact managers are programs that enable people to keep track of their associates and tasks. Contact managers are used by salespeople, customer service representatives, and managers.

Contact managers are related to calendars, but integrate email and personal file information (phone numbers and addresses), with task lists and histories of interactions.

There are two types of contact managers: Software that you install on your personal computer or intranet and hosted applications (ASP).

Contact management software

Examples include TeleMagic (Windows), ACT! (Windows), Maximizer software (Windows), GoldMine (Windows), Entourage (Mac OS X), Contactizer (Mac OS X). The market for contact management software has weakened since the late 1990s, when Microsoft integrated basic contact management features into its Outlook email and PIM program. For enterprise users, Microsoft also offers Business Contact Manager for Outlook. Even on the Macintosh platform, Apple began including PIM, calendar, and to-do applications with its operating system in 2002. Many developers of contact managers have consequently gone out of business or been taken over by other companies.

In order to differentiate themselves from Outlook, more fully featured contact managers have moved into the realm of customer relationship management (CRM) software. Avidian has taken an interesting approach to leveraging Outlook and turning outlook into a full feature Contact Management and CRM Software.

Hosted contact managers

The best-known example of a hosted contact manager is Salesforce.com which offers contact manager functionality via the web. Other hosted Contact Management software includes: NetSuite, Oracle, RightNow Technologies, 24SevenOffice and Really Simple Systems.

The main difference from a network (client server) contact manager above is that the business data and documents are kept in a server farm at a business ISP (Internet Service Provider). This enables staff to access their data at home or when away from the office using just a connection to the Internet, and without necessitate the extra set-up required for a VPN (Virtual Private Network).

For security purposes, and for a larger user working area on the screen, a hosted contact manager software program can be written to give a “Full Screen Experience” so that it mirrors the look and feel of its non-hosted cousin - for example the LiveView service distributed by The Future Office [1].

Personal Contact Managers

New services such as Keepm [2], and Highrise [3] have evolved as personal contact managers. Both have made strides to avoid similarities to older more popular contact management systems such as Salesforce, or 24SevenOffice, whose software is made for business grade management. These personal contact managers are becoming popular with smaller businesses and home businesses, who don’t need extra features, just the “pen and paper” version of the web.

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The Canon EF-S 10-22mm 3.5-4.5 USM lens is a wide to ultra-wide angle zoom lens for Canon digital single-lens reflex cameras with a Canon EF-S lens mount.<ref name=”canonmuseum”></ref>
The lens’ angle of view is equivalent to a 16-35 mm on a 35 mm camera. The exterior of the lens does not extend nor rotate during focusing nor zooming, but a moving inner tube is present to facilitate zooming. Of the 13 elements, one is Canon’s Super Ultra-Low Dispersion glass and 3 are aspherical elements.

External Links

• Press release on Dpreview

References

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• Lens - Wikipedia, the free encyclopedia The word lens originally comes from the Latin for a lentil; the first, biconvex, optical lens was given its name because it was lentil-shaped.
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The Jacksonville Stallions are a team in the National Indoor Football League. They play their home games at the Jacksonville Veterans Memorial Arena in Jacksonville, Florida

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In optics, a simple lens or singlet lens is a lens consisting of a single simple element. Typical examples include a magnifying glass or a lens in a pair of simple reading glasses.

Simple lenses are prone to chromatic and other aberrations and cannot be used by themselves for precise optical requirements.

Some cameras with fixed lenses have however been made using a simple lens, usually a meniscus lens with the convex face outwards. In such examples the lens aperture is made small and in some cases (such as the Kodak Brownie 127 camera), the film plane is curved to reduce the impact of aberrations.

See also

• Lens (optics)
• Aspheric lens

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Trifocals are eyeglasses where the lenses have 3 regions to correct for distance, intermediate (arm’s length), and near vision. They are mostly used by people with advanced presbyopia who have been prescribed 2 diopters or more of reading addition. The intermediate addition is normally half the reading addition. So, for someone with a distance prescription of -4 diopters and a reading addition of +3, the reading portion of their trifocals would have a net power of -1, and the intermediate segment would be -2.5 diopters.

Trifocal lenses are made in similar styles to bifocals, but with an additional segment for intermediate vision above the reading section. A common style is the 7×28 flat-top or D-shaped segment, 28 mm wide, with a 7 mm high intermediate segment. Larger intermediate segments are available, and are particularly useful for people who spend a lot of time using computers.

Trifocals are becoming rarer as more people choose to wear progressive lenses.

Donald Rumsfeld is a trifocal-wearer.

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The EF 24-70mm f/2.8L is a professional EF mount wide-to-normal zoom lens. It was introduced by Canon in 2002 to replace the well-regarded 28-70mm f/2.8L.

Like its predecessor, this lens is often considered to have excellent contrast, color rendition and sharpness. However, some copies of the lens have also been reported to exhibit deficiencies and operational problems not present in the older 28-70mm lens, including poor sharpness and/or chromatic aberration. Some reports suggest that the lens performs well only at certain apertures and focal lengths; others suggest that the lens back-focuses, primarily on DSLR cameras. The disparity between positive and negative reports about this lens indicates both manufacturing inconsistencies and subtle camera compatibility issues, as well as potential user error with the increase in sales of L-quality lenses amongst DSLR users.

The lens includes sealing against dust and water, although it is not waterproof. It also includes an 8-bladed curved diaphragm which remains nearly circular from f/2.8 to f/5.6. Characteristic of zoom lenses, it exhibits some barrel distortion at its shortest focal length.

Reverse zoom

An unusual aspect of the 24-70mm f/2.8L (and 28-70mm f/2.8L) is that its barrel extends as it zooms toward its shortest focal length. When used with the supplied lens hood, which attaches to a non-moving part of the lens, this extension results in a properly matched shade at every angle of view. Most zoom lens hoods are designed for only the widest angle of view, offering progressively inadequate shade at longer focal lengths.

This reverse zoom is illustrated with the following two pictures:

Lens at 70 mm with a UV filter

Lens at 24 mm with a UV filter

At the telephoto end (70 mm) the end of the lens is the most retracted providing the most shade protection from the lens hood.
At the widest end (24 mm) the end of the lens is the most protruding providing the least shade protection from the lens hood.

References

1. FM reviews - Canon EF 24-70mm f/2.8L USM

See also

• Canon EF 28-70mm lens, was essentially the lens replaced by the 24-70mm
• Canon EF 70-200mm lens, has the same maximum aperture of 2.8 and continues the 24-70mm focal length through 200 mm

External links

• Canon EF 24-70mm f/2.8L USM

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In optics, a simple lens or singlet lens is a lens consisting of a single simple element. Typical examples include a magnifying glass or a lens in a pair of simple reading glasses.

Simple lenses are prone to chromatic and other aberrations and cannot be used by themselves for precise optical requirements.

Some cameras with fixed lenses have however been made using a simple lens, usually a meniscus lens with the convex face outwards. In such examples the lens aperture is made small and in some cases (such as the Kodak Brownie 127 camera), the film plane is curved to reduce the impact of aberrations.

See also

• Lens (optics)
• Aspheric lens

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Sains-en-Gohelle is a commune of northern France.

Population (1999):6,135

Postal code: 62114.

Administration

Sains-en-Gohelle is the chief town of the canton of Sains-en-Gohelle, in the Pas-de-Calais département, arrondissement of Lens. It belongs to the communauté d’agglomération of Lens-Liévin (Communaupole) which gathers 36 communes, with a total population of 250,000 inhabitants.

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A Moore Desk is not one but two large antique desk forms.

The “Moore Office Queen” is a massive desk, made for a sitting user. From the outside it looks, when closed, much like its competitor, the Wooton desk but it differs from it in several ways. For one, it has but a single large door to lock up the main work surface and the drawers and nooks around it, while the Wooton has two. More importantly (the manufacturer liked to boast about it) the main work surface slides in and out of the main body of the desk so that work can be stopped and the desk closed without having to put away everything, as is the case for the Wooton desk.

The “Moore Office Queen” was patented in 1878 in Indiana in the United States by the Moore Combination Desk Company.

The Office Queen has a modern descendant called the Armoire desk.

The “Moore Insurance Desk” is nearly twice as big as the “Office Queen” and combines a Standing desk and a normal “sitting” desk in a single piece of furniture. It was patented in 1882. Like the “Office Queen” it opens up by means of a single large door, and its internal work surface slides in and out. But it also has an external work surface to accommodate a standing user, on the other side of the desk. The standing user employs the “roof” of the desk of the sitting user as his (or her) work surface.

References

See also

• desk forms and types
• furniture

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Adama Coulibaly (born September 10, 1980) is a Malian football (soccer) defender. He was born in Bamako, Mali, and began his career in his local club, Djoliba AC. Coulibaly has played for his current team, the RC Lens, since 1999.<ref name=yahoo></ref> He has played international matches for Mali.<ref name=fr/>

Playing career

• 1998-99 : Djoliba AC 20 appearances/1 goal
• 1999-00 : RC Lens 5/0
• 2001-02 : Lens 22/2
• 2002-03 : Lens 25/0
• 2003-04 : Lens 22/1
• 2004-05 : Lens 18/0
• 2005-06 : Lens 29/2
• 2006-07 : Lens 41/2<ref name=fr></ref>

Honors and awards

• FIFA World Youth Championship 3rd place: 1999

References

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An achromatic lens or achromat is a lens that is designed to limit the effects of chromatic and spherical aberration.

The most common type of achromat is the achromatic doublet, which is composed of two individual lenses made from glasses with different amounts of dispersion. Usually one element is a concave lens made out of flint glass, which has relatively high dispersion, while the other, convex, element is made of crown glass, which has lower dispersion. The lens elements are mounted next to each other and shaped so that the chromatic aberration of one is counterbalanced by the chromatic aberration of the other, while the positive power of the crown lens element is not quite equalled by the negative power of the flint lens element. Together they form a weak positive lens that will bring two different wavelengths of light to a common focus. Achromatic lenses are corrected to bring two wavelengths (typically red and blue) into focus in the same plane.

Credit for the first invention, around 1733, of the achromatic refracting lens is given to an English barrister named Chester Moore Hall.

The exact date of the first achromatic doublet’s creation is not known, nor is the name of the person who first accomplished the task. Theoretical considerations of the feasibility of the system were debated in the 18^th century following Newton’s statement that such a correction was impossible (see History of the telescope). Some of the concepts were demonstrated with lenses made of glass and water, but the first useful lenses were not known to have been made until the early 18^th century by George Bass under the direction of Hall. The first patent for an achromatic doublet was awarded to John Dollond around 1758 following his independent theoretical and experimental work.

The triple achromat, which reduced secondary colour defects, was invented in 1763 by Peter Dollond.

See also

• Achromatic telescope
• Apochromat

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This Leica lens remains in the eyes of many, one of the top 5 lenses in the Leica R lens system.

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Grand Union was a dance group practicing dance improvisation in New York from 1970 to 1976. A breakaway group from Judson Dance Theater led by Steve Paxton, Grand Union developed the dance form contact improvisation (CI) as a method for creating improvised dance works. Dance artists involved with Grand Union include:

• Steve Paxton
• Nancy Stark Smith
• Daniel Lepkoff
• Lisa Nelson
• David Gordon (dance)

See also

• contact improvisation
• dance improvisation
• Judson Dance Theater

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This article is about the Amiga game. For the sport, see base jumping.

Base Jumpers is a platform game developed by Shadow Software for the Amiga. It was released in 1995 and pusblished by Rasputin Software.

In this game, the player is a base jumper who jumps from towers. Each tower is a level through which the player must work himself, up towards the top in a platform gaming sequence. To collect bonuses, the player must find and pick up letters that form certain combinations (500 in total).

When reaching the top, there is a base jumping contest between the players. Up to four players may play simultaneously.

External references

• Hall of Light entry
• LemonAmiga entry

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Proetida is an order of trilobite that lived from the Ordovician to the Permian. It was the last order of trilobite to go extinct, finally dying out in the Permian extinction.

These typically small trilobites resemble those of the order Ptychopariida, from which the new order Proetida was only recently separated in 1975 by Fortey and Owens. Like the order Phacopida, the proetids have exoskeletons that sometime have pits or small tubercles, especially on the glabella (middle portion of the head). Because of their resemblance to the Ptychopariida in some features, the proetids are included in the subclass Librostoma.

Unlike some trilobites of the order Phacopida, whose eyes are schizochroal, the proetids have the more common holochroal eyes. These eyes are characterized by close packing of biconvex lenses beneath a single corneal layer that covers all of the lenses. Each lens is generally hexagonal in outline and in direct contact with the others. They range in number from one to more than 15,000 per eye. Eyes are usually large, and because the individual lenses are hard to make out, they look smooth and sometimes bead-like.

The thorax of proetids was made up of anywhere between 8-22 segments, but most commonly 10. Many also have genial spines coming off either side of the head, though in some they are blunted. These two features can aid in distinguishing proetids from some trilobites in the order Phacopida, to which they can be very similar.

References

• Pictorial guide to the order Proetida, by Sam Gon III
• Order Proetida, also by Sam Gon III

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Soto Cano Air Base (formerly Palmerola Air Base) is a joint United States and Honduras military base near Comayagua in Honduras. A large concentration of US troops and the Honduran military Air Force academy. The airbase became operational in 1981.
Oliver North once used Palmerola as a base of operations for the U.S. backed Contras in the 1980s. Now the U.S. military uses Soto Cano as a launching point for its war on drugs efforts in Central America as well as humanitarian aid missions throughout Honduras and Central America.

In addition to the Honduran Air Force Academy, the US military’s Joint Task Force Bravo (JTF-B) is headquartered at Soto Cano. JTF-B consists of Medical Element - Military Hospital, Army Forces, Air Force Forces, Joint Security Forces, and the 1st Battalion-228th Aviation Regiment (consisting of some 18 aircraft, a mix of UH-60 Black Hawk helicopters and CH-47 Chinook helicopters). Total size of JTF-B is approximately 500 troops.

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In geometry, the pentagonal rotunda is one of the Johnson solids (J₆). It can be seen as half an icosidodecahedron.

The 92 Johnson solids were named and described by Norman Johnson in 1966.

External link

• Johnson Solid — from MathWorld

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Wray (Optical Works) Ltd. was a British camera and lens manufacturer based in Bromley, Kent.

The company had a reputation for producing excellent quality lenses and durable quality cameras including models such as the Wrayflex. Many Wray lenses remain in use, especially in
Wray also made aerial reconnaissance lenses. Their 36″ f/6.3 is particularly good but suffers from spherical aberration on full bore. They also made a 36″ f/4, but this can only be used with an orange filter and orthochromatic film as it is not well corrected for chromatic aberration.

photographic enlargers.

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Angres is a town in northern France. Population (1999): 4,508 inhabitants.

Administration

Angres is a commune of the Pas-de-Calais département (62), canton of Liévin-Sud, arrondissement and a metro area of Lens. It belongs to the communauté d’agglomération of Lens-Liévin (Communaupole) which gathers 36 communes, with a total population of 250,000 inhabitants.

Location

The Bois de l’Abime (Abime Forest) is in the south along with two other communes of Souchez and Givenchy-en-Gohelle.

Miscellaneous

Angres is twinned with Danderhall, Midlothian, Scotland.

External links

• Communaupole of Lens-Liévin website

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