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varifocal

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varifocal
varifocal, a. (vɛərɪˈfəʊkəl) [f. vari- + focal a.] a. Having a focal length that can be varied.1945 Jrnl. Soc. Motion Picture Engineers XLV. 466 A new positive Vari-Focal view-finder for motion picture cameras. 1962 Jrnl. Optical Soc. Amer. LII. 353/2 The two-lens varifocal system consists of a sing... Oxford English Dictionary
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Varifocal lens
A varifocal lens is a camera lens with variable focal length in which focus changes as focal length (and magnification) changes, as compared to a parfocal Varifocal lenses can be used for image display as well as capture, and Oculus VR has confirmed developing a varifocal display for virtual reality. wikipedia.org
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Parfocal lens
Many zoom lenses, particularly in the case of fixed-lens cameras, are actually varifocal lenses, which gives lens designers more flexibility in optical wikipedia.org
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Zoomar
Zoomar (ˈzuːmɑː(r)) Also zoomar. A proprietary name in the U.S. for a make of zoom lens.1946 Jrnl. Soc. Motion Picture Engineers XLVII. 465 (caption) Optical principle of Zoomar lens. 1947 Official Gaz. (U.S. Patent Office) 10 June 177/2 ‘Zoomar’ for varifocal camera lenses. 1961 A. L. M. Sowerby Di... Oxford English Dictionary
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Homepage - welcome to ASDA
Asda Opticians was first introduced to our stores in the year 2000 and is now in over 157 Asda stores across the United Kingdom and Northern Ireland. * Our prices include: Frames, single vision or digital varifocal lenses (if needed for your prescription, excluding the £15 single vision range), anti-reflective coating, tinted lenses (if chosen ...
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Security Cameras | Home Security Surveillance Cameras - Lorex
Lorex N3 4K IP Wired Bullet Security Camera with Motorized Varifocal Lens and Real-Time 30FPS Recording LNB9282B. Reg. $229.99 $195.99 SAVE $34.00 (15%) Multi-pack: Single. 2-pack. 4-pack. Color: Add to cart.
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Panasonic Leica DG Vario-Elmarit 8-18 mm
It is a varifocal lens branded with the German label Leica, but manufactured by Panasonic in Japan. wikipedia.org
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zoom
▪ I. zoom, v. (zuːm) [Echoic.] 1. intr. To make a continuous low-pitched humming or buzzing sound; to travel or move (as if) with a ‘zooming’ sound; to move at speed, to hurry. Also loosely, to go hastily. Freq. with advbs. colloq.1892 ‘Q’ I saw three Ships i, Amid..the scraping and zooming of the i... Oxford English Dictionary
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Panasonic Lumix G Vario 45–200mm lens
It is a varifocal lens. wikipedia.org
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Vergence-accommodation conflict
These displays include varifocal, multifocal, holographic, pin-mirror and light field displays. Varifocal display is a concept explored mainly in VR display solutions. wikipedia.org
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Lipán M3
It is equipped with cameras Varifocal and infrared vision system, which are multiplexed to leave the video transmitter and receiving station ground control wikipedia.org
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Kiron Lenses
In particular, the Kiron 28mm/2.0, the 105mm/2.8 1:1 macro, the 28-210mm/4.0-5.6 and the 3.8-5.6 varifocal zoom, and the 28-85mm/2.8-3.8 varifocal macro 1:4.0–5.6 varifocal zoom (14 elements/11 groups) 30–80mm 1:3.5–4.5 varifocal zoom 35–135mm 1:3.5–4.5 varifocal zoom 105mm 1:2.8 (macro 1:1)(6 elements wikipedia.org
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Zoomar lens
Back applied for a patent in 1946 for a "Varifocal lens for cameras", which described the theory of its operation, using five sets of lenses: ordered from His varifocal lens design was an outgrowth of work he had previously performed for motion picture camera viewfinders and the projector part of a torpedo-targeting wikipedia.org
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Panasonic Leica DG Vario-Elmar 100-400 mm
It is a varifocal lens branded with the German label Leica, but is currently manufactured in China by Panasonic, previously Japan. wikipedia.org
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Index of physics articles (V)
constants commonly used in physics Variational method Variational methods in general relativity Variational perturbation theory Variational principle Varifocal wikipedia.org
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