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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.
F15 Machine gun clinometer M1917 Parts and equipment; F16 Sight, panoramic, machine gun, M1918 – Parts and equipment; F17 Device, aiming, mirror, M1918 – Parts and equipment, 23 November 1926; F18 Night lighting device, parts and equipment; F19 Board, deflection, M1; F20; F21 Kit, repair optical, for field artillery equipment; F22 Telescope ...
Edmund Scientific Corporation, based in Barrington, New Jersey, was founded in 1942 as a retailer of surplus optical parts like lenses.It later branched out into complete systems like telescopes and microscopes, and in the 1960s, a wide variety of science toys and kits.
The 1.07 m (42 in) John Hall Telescope was built by AstroMechanics and installed at Anderson Mesa in 1970. [7] It was named after former Lowell Observatory director John S. Hall in 1990. [ 8 ] In 2004, the Ritchey-Chrétien telescope was upgraded with a new mirror from Hextek , and with other parts.
In an image captured by the Hubble Space Telescope, Saturn’s rings display an unexplained phenomenon that looks like spokes moving across its rings.
People demonstrating a Schmidt–Cassegrain telescope at a sidewalk gathering. The Schmidt–Cassegrain design is very popular with consumer telescope manufacturers because it combines easy-to-manufacture spherical optical surfaces to create an instrument with the long focal length of a refracting telescope with the lower cost per aperture of a reflecting telescope.
Questar Standard 3 ½” In development since 1946, the Questar 3-1/2 has been the company's most notable product. Braymer’s basic concept for the telescope was one of portability, compactness, and ease of use.
Three variants of the Saturn family which were developed: Saturn I, Saturn IB, and Saturn V. The Saturn family of American rockets was developed by a team of former German rocket engineers and scientists led by Wernher von Braun to launch heavy payloads to Earth orbit and beyond. The Saturn family used liquid hydrogen as fuel in the upper stages.
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3579 S High St, Columbus, OH · Directions · (614) 409-0683