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In 2004, Meade acquired Coronado Filters from founder and designer David Lunt, [21] [22] who produce an extensive range of specialty telescopes that allow views of the sun in Hydrogen-Alpha, and formerly, at Calcium K line wavelengths. The Meade Coronado telescopes are called "Solarmax 40" or higher depending on the model. Coronado Personal ...
Solar telescopes often have multiple focal lengths, and use a various combination of mirrors such as coelostats, lenses, and tubes for instruments including spectrographs, cameras, or coronagraphs. There are many types of instruments that have been designed to observe Earth's Sun, for example, in the 20th century solar towers were common.
European Solar Telescope (EST), a proposed 4-meter class aperture telescope. Chinese Giant Solar Telescope (CGST), a proposed 5- to 8-meter aperture telescope. National Large Solar Telescope (NLST), is a Gregorian multi-purpose open telescope proposed to be built and installed in India and aims to study the Sun's microscopic structure.
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The largest optical instruments at KPNO are the Mayall 4 meter telescope and the WIYN 3.5-meter telescope; there are also several two- and one-meter class telescopes. The McMath–Pierce solar telescope was for many decades [8] the largest solar telescope in the world and the largest unobstructed reflector (no secondary mirror in the path of ...
Coronagraph image of the Sun. A coronagraph is a telescopic attachment designed to block out the direct light from a star or other bright object so that nearby objects – which otherwise would be hidden in the object's bright glare – can be resolved.