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The predecessor of Celestron was Valor Electronics, an electronics and military components firm founded in 1955 by Tom Johnson. [1] [2] [3] Johnson became involved with telescopes when he built a 6" reflecting telescope for his two sons. [2] In 1960, Johnson established the "Astro-Optical" division of Valor, which would later become Celestron. [3]
Like all lenses in the DX format, the 18-55mm casts a smaller image circle than lenses for full-frame 35mm cameras and is therefore only compatible with cameras having APS-C-sized sensors (or vignetting will happen). However, from 24mm onward until 55mm, the image circle will cover the full 35mm frame, and is usable on film.
The AF-S DX Zoom-Nikkor 18-70mm f /3.5–4.5 G ED-IF is an F-mount zoom lens manufactured and sold by Nikon. Designed exclusively for use on Nikon DX format cameras, this lens covers from wide-angle to medium-telephoto range. This lens was announced in January 2004 [2] and was initially available as kit lens for the then-new Nikon D70. Later ...
Nikon announced the lens on 22 July 2003. [2] It was the first prime lens released by Nikon specifically designed for Nikon DX format DSLR cameras. The lens produces a distinctive rectangular fisheye image, which fills the DX format frame (as opposed to a circular fisheye lens which produces a circular image).
Schematic of a typical EDXRD experiment. Energy-dispersive X-ray diffraction (EDXRD) is an analytical technique for characterizing materials.It differs from conventional X-ray diffraction by using polychromatic photons as the source and is usually operated at a fixed angle. [1]
It was the first game released under the Namco Generations label, used for remakes of older Namco video games. Upon release, Pac-Man Championship Edition DX was met with critical acclaim, many calling it one of the best Pac-Man games ever made and one of the greatest video game remakes of all time. Critics applauded the game's addictive nature ...
A DX-pedition is an expedition to what is considered an exotic place by amateur radio operators and DX listeners, typically because of its remoteness, access restrictions, or simply because there are very few radio amateurs active from that place. This could be an island, a country, or even a particular spot on a geographical grid.
Edlin is a line editor, and the only text editor provided with early versions of IBM PC DOS, [1] MS-DOS and OS/2. [2] Although superseded in MS-DOS 5.0 and later by the full-screen MS-DOS Editor, and by Notepad in Microsoft Windows, it continues to be included in the 32-bit versions of current Microsoft operating systems.
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