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Celestron was the first large scale commercial manufacturer of the Schmidt-Cassegrain telescope, introducing its "C8" 8" diameter 2032 mm focal length, ƒ10 telescope in 1970. [7] The primary innovation Celestron/Tom Johnson devised was a method to produce Schmidt corrector plates using a vacuum to pull the glass blanks into a pre-shaped curve ...
Synta Technology Corporation was founded in Taoyuan, Taiwan around 1980 by mechanical and optical designer Dazhong Shen, (a/k/a David Shen). In 1992 Synta, along with Canadian investors, established the Suzhou Synta Optical Technology Co., Ltd in Suzhou (Jiangsu), China (outside Shanghai) as a manufacturing facility producing telescopes for Celestron and Tasco.
The SkyScout was a handheld, battery powered device about 7.4" x 4.0" x 2.5", and weighing about 1 pound. It had a viewing port, a 3" x 1" LCD display on the side and several buttons for controlling and selecting device functions.
The Celestron 8 was more compact, affordable and easier to manufacture than traditional telescopes, like the Schmidt–Cassegrain. [2] Johnson's new telescope proved very popular in the amateur astronomy and educational industries, allowing the hobby to rapidly expand and reach more consumers. [2] Johnson sold Celestron in 1980. [2]
Multiple mirror telescopes that are on the same mount and can form a single combined image are ranked by their equivalent aperture. Fixed altitude telescopes (e.g. HET) are also ranked by their equivalent aperture. All telescopes with an effective aperture of at least 3.00 metres (118 in) at visible or near-infrared wavelengths are included.
This is a list of large optical telescopes. For telescopes larger than 3 meters in aperture see List of largest optical reflecting telescopes . This list combines large or expensive reflecting telescopes from any era, as what constitutes famous reflector has changed over time.
Smart telescopes were introduced to the consumer market in the 2010s. They are self contained astronomical imaging devices that combine a small (50mm to 114mm objective) telescope and GoTo technology with pre-packaged software designed for astrophotography of deep-sky objects .
The observatory contains two historically important telescopes: the 100-inch (2.5 m) Hooker telescope, which was the largest aperture telescope in the world from its completion in 1917 to 1949, and the 60-inch telescope which was the largest operational telescope in the world when it was completed in 1908.