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Primary lens: The objective of a refracting telescope. Primary mirror: The objective of a reflecting telescope. Corrector plate: A full aperture negative lens placed before a primary mirror designed to correct the optical aberrations of the mirror. Schmidt corrector plate: An aspheric-shaped corrector plate used in the Schmidt telescope.
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.
Celestron Telescope for $246.49 (save $103) Jackery Explorer Portable Power Station for $399 (save $400) ... Dozens rescued as rain leads to flooding and travel is disrupted in parts of the UK ...
Celestron, maker of telescopes, binoculars and other optics, is a reliable brand you can trust. These "power viewers" allow you to safely view the eclipse, but also give your view a 2x ...
In June 1998, Tasco purchased Celestron, another telescope manufacturer which focused on performance optical equipment and the more serious observer. Celestron was second only to Meade Instruments Corporation in sales of telescopes. [9] Early in 2001, Tasco began searching for a buyer as profits sank.
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