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  2. List of telescope parts and construction - Wikipedia

    en.wikipedia.org/wiki/List_of_telescope_parts...

    Star Diagonal: Used to change the angle of the light coming out of a telescope, for easier viewing. Herschel Wedge: Similar to a star diagonal with a wedge-shaped unsilvered prism reflector that reduces incoming light by up to 95% for solar viewing. Coma corrector a correcting lens used to reduce coma distortion in fast reflecting telescopes.

  3. List of the United States Army fire control and sighting ...

    en.wikipedia.org/wiki/List_of_the_United_States...

    This is a list of United States Army fire control, and sighting material by supply catalog designation, or Standard Nomenclature List (SNL) group "F".The United States Army Ordnance Corps Supply Catalog used an alpha-numeric nomenclature system from about the mid-1920s to about 1958.

  4. Anna L. Nickel telescope - Wikipedia

    en.wikipedia.org/wiki/Anna_L._Nickel_telescope

    The smaller dome on the main building at Lick had originally held the secondhand 12-inch Clark refracting telescope, the first telescope to be used at Lick. In 1979 it was replaced with the Anna L. Nickel telescope, a 1-meter reflecting telescope. The telescope is named for Anna L. Nickel, a San Francisco native who donated $50,000, a large ...

  5. RC Optical Systems - Wikipedia

    en.wikipedia.org/wiki/RC_Optical_Systems

    The smallest RCOS telescope, the 12.5 inch F/9 Ritchey-Chrétien had a base price of just over twenty thousand US dollars in 2009, with large and/or custom models costing considerably more. RC Optical Systems and Star Instruments won a lawsuit in 2008 against Meade Instruments over Meade's description of RCX400 and LX200R telescopes and the ...

  6. Lists of telescopes - Wikipedia

    en.wikipedia.org/wiki/Lists_of_telescopes

    Telescope History Archived 2021-02-14 at the Wayback Machine, NASA Official Website, accessed 02/09/2019 History of the Telescope , accessed 02/09/2019 List of astronomical observatories and telescopes , Encyclopedia Britannica, 02/09/2019

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  8. Questar Corporation - Wikipedia

    en.wikipedia.org/wiki/Questar_Corporation

    A 7-inch (180 mm) model was introduced in 1967 for amateur and professional astronomers, hobbyists, industry and government. A scaled-up version of the Questar 3.5" with the integrated Control Box, the Questar Seven, with a nominal 2400mm focal length, has twice the aperture and four times the light gathering power of the 3.5.

  9. Yerkes Observatory - Wikipedia

    en.wikipedia.org/wiki/Yerkes_Observatory

    The old Yerkes 24 inch (2 foot telescope) reflecting telescope, now in a museum Diagram of the Bruce astrograph. A 12-inch refractor was moved to Yerkes from Kenwood Observatory in the 1890s. [13] Two other telescopes planned for the observatory in the 1890s were a 12-inch aperture refractor and a 24-inch reflecting telescope. [13]

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