fixed focus lens definition

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Foci Definition & Meaning - Merriam-Webster

The meaning of FOCUS is a center of activity, attraction, or attention. How to use focus in a sentence. Did you know?

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Carl Zeiss AG - Wikipedia

Carl Zeiss AG (German: [kaʁl ˈtsaɪs]), branded as ZEISS, is a German manufacturer of optical systems and optoelectronics, founded in Jena, Germany in 1846 by optician Carl Zeiss.

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Lens - Wikipedia

A lens with one convex and one concave side is convex-concave or meniscus. It is this type of lens that is most commonly used in corrective lenses. If the lens is biconvex or plano-convex, a collimated beam of light passing through the lens converges to a spot (a focus) behind the lens.

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Focus Definition & Meaning | Dictionary

Focus definition, a central point, as of attraction, attention, or activity: The need to prevent a nuclear war became the focus of all diplomatic efforts. See more.

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Camera lens - Wikipedia

From the front of the camera, the small hole (the aperture), would be seen. The virtual image of the aperture as seen from the world is known as the lens' entrance pupil; ideally, all rays of light leaving a point on the object that enter the entrance pupil will be focused to the same point on the image sensor/film (provided the object point is in the field of view).

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Digital camera - Wikipedia

Lens is a 146 degree wide angle or standard lens, with fixed focus. It can have a microphone and speaker, And it can take photos and video. As a remote camera, a phone app using Android or iOS is needed to send live video, change settings, take photos, or use time lapse.

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Digital camera - Wikipedia

Lens is a 146 degree wide angle or standard lens, with fixed focus. It can have a microphone and speaker, And it can take photos and video. As a remote camera, a phone app using Android or iOS is needed to send live video, change settings, take photos, or use time lapse.

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Amazon: Gosky Updated 20-60x80 Spotting Scopes with ...

Variable 20x to 60x magnification and dynamic lens focusing system - makes it easy to zoom in. Perfect for archery, watching, wildlife watching, hiking, camping, scenery, outdoor sporting, astronomical observation etc. Fully multi-coated 80mm green film objective lens provides a field of view at 82.9-48ft/1000yards.

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Foci - definition of foci by The Free Dictionary

Define foci. foci synonyms, foci pronunciation, foci translation, English dictionary definition of foci. n. A plural of focus. American Heritage® Dictionary of the English Language, Fifth Edition.

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Inverted Microscope- Definition, Principle, Parts, Labeled ...

They use light rays to focus on a specimen, to form an image that can be viewed by the objective lenses. However, in the inverted microscope, the light source and the condenser are found on top of the stage pointing down to the stage. The condenser lens above the specimen stage functions primarily to concentrate the light on the specimen.

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What is a Prime Lens and What are the Benefits of Using One?

Meaning there is a narrower range of focus in the image. The background is blurred and out of focus, while only the subject remains in focus. This blurred background allows the subject to stand out, creating some incredible looking stills. Another benefit of the wide maximum apertures on prime lenses is the amount of light that can get it.

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Strauss–Howe generational theory - Wikipedia

The Strauss and Howe retelling of history through a generational lens has received mixed reviews. Many reviewers have praised the authors for their ambition, erudition and accessibility. For example, former U.S. Vice President Al Gore , who graduated from Harvard University with Strauss, called Generations: The History of America' Future, 1584 ...

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Amazon : Nikon AF-S FX NIKKOR 105mm f/1.4E ED Lens with ...

This item: Nikon AF-S FX NIKKOR 105mm f/1.4E ED Lens with Auto Focus for Nikon DSLR Cameras Get it as soon as Saturday, Jul 23 FREE Shipping on orders over $25 shipped by Amazon Only 1 left in stock - order soon.

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Astrophotography - Wikipedia

Prime focus – In this method the image produced by the telescope falls directly on the film or CCD with no intervening optics or telescope eyepiece. Positive projection – A method in which the telescope eyepiece ( eyepiece projection ) or a positive lens (placed after the focal plane of the telescope objective) is used to project a much ...

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NEWS RELEASES - HubbleSite

Journalist Resources. Visit the Space Telescope Science Institute (STScI) News Center for fact sheets, contacts, or to request an interview with an astronomer.

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2022 Guide: Best Macro lens for iPhone Photography - Shotkit

Aside from the 25x macro lens, there’s a 22x telephoto option with a fixed focal length, a 205° fisheye lens, and a 4K HD 0.67X super-wide lens. The super-wide and macro lenses screw together to form a single compact unit. The 22x telephoto external lens looks a little silly poking out from your iPhone like a toy Nikon telephoto superlens.

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NEWS RELEASES - HubbleSite

Journalist Resources. Visit the Space Telescope Science Institute (STScI) News Center for fact sheets, contacts, or to request an interview with an astronomer.

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Exposure (photography) - Wikipedia

Exposure time is controlled in a camera by shutter speed, and the illuminance depends on the lens aperture and the scene luminance. Slower shutter speeds (exposing the medium for a longer period of time), greater lens apertures (admitting more light), and higher-luminance scenes produce greater exposures.

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Bright Field Microscope: Definition, Parts, Working Principle ...

Stained, fixed and live specimens are observed under a bright field microscope. A bright-field microscope is consists of A piece of apparatus, consisting of an eyepiece, an objective lens, a condenser lens, stage, and light source, which collects electromagnetic radiation in the visible range. Working Principle of Bright Field Microscope

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Focus Definition & Meaning - Merriam-Webster

focus: [noun] a center of activity, attraction, or attention. a point of concentration.

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Prime lens - Wikipedia

In film and photography, a prime lens is a fixed focal length photographic lens (as opposed to a zoom lens), typically with a maximum aperture from f2.8 to f1.2. The term can also mean the primary lens in a combination lens system. Confusion between these two meanings can occur if context doesn't make the interpretation clear.

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General relativity - Wikipedia

This suggests the definition of a new class of inertial motion, namely that of objects in free fall under the influence of gravity. This new class of preferred motions, too, defines a geometry of space and time—in mathematical terms, it is the geodesic motion associated with a specific connection which depends on the gradient of the ...

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Optical microscope - Wikipedia

Adjustment knobs move the stage up and down with separate adjustment for coarse and fine focusing. The same controls enable the microscope to adjust to specimens of different thickness. In older designs of microscopes, the focus adjustment wheels move the microscope tube up or down relative to the stand and had a fixed stage. Frame

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What is Focal Length? (And Why it Matters in Photography!)

That is the point of sharpest focus. Lens manufacturers have done the testing and the math. They have measured the distance between this point of convergence and the camera’s sensor. That is the focal length of the lens. They label each lens with the focal length in millimeters (mm). Take a look at this diagram showing the side view of a lens.

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