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2. Celestron - Wikipedia

   en.wikipedia.org/wiki/Celestron

   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 ...

3. Binoculars - Wikipedia

   en.wikipedia.org/wiki/Binoculars

   The telescope tubes of compact binoculars can often be folded closely to each other to radically reduce the binocular's volume when not in use, for easy carriage and storage. Many tourist attractions have installed pedestal-mounted, coin-operated binocular tower viewers to allow visitors to obtain a closer view of the attraction.

4. Hoher List Observatory - Wikipedia

   en.wikipedia.org/wiki/Hoher_List_Observatory

   In February 2012, the Argelander Institute for Astronomy ceased any scientific education and observing completely, and the University of Bonn shut down the observatory in July 2012. The scientific instrumentation, including all telescopes, were to be vended thereafter, which was actually done in case of the 50-cm Schmidt telescope.

5. List of largest optical reflecting telescopes - Wikipedia

   en.wikipedia.org/wiki/List_of_largest_optical...

   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.

6. Tom Johnson (astronomer) - Wikipedia

   en.wikipedia.org/wiki/Tom_Johnson_(astronomer)

   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]

7. Meade Instruments - Wikipedia

   en.wikipedia.org/wiki/Meade_Instruments

   On November 26, 2019, in the United States District Court for the Northern District of California a federal jury found that Ningbo and Meade suppressed competition and fixed prices for consumer telescopes in the United States in violation of federal antitrust laws (case# 16-06370). [10] Optronic Technologies, Inc. was awarded $16.8 million in ...