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Newtonian telescope design. A Newtonian telescope is composed of a primary mirror or objective, usually parabolic in shape, and a smaller flat secondary mirror.The primary mirror makes it possible to collect light from the pointed region of the sky, while the secondary mirror redirects the light out of the optical axis at a right angle so it can be viewed with an eyepiece.
An Astroscan wide-field Newtonian reflector. The Astroscan was a wide-field 4⅛" clear-inch (105mm) diameter reflecting telescope , originally produced by the Edmund Scientific Corporation , that was for sale from 1976 to 2013.
The Meade Instruments (also shortened to Meade) was an American multinational company headquartered in Watsonville, California, that manufactured, imported and distributed telescopes, binoculars, spotting scopes, microscopes, CCD cameras, and telescope accessories for the consumer market. [2]
A Newtonian telescope on a simple Dobsonian mount. An altazimuth mount or alt-azimuth mount is a simple two-axis mount for supporting and rotating an instrument about two perpendicular axes – one vertical and the other horizontal. Rotation about the vertical axis varies the azimuth (compass bearing) of the pointing direction of the instrument.
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.
Astro-Physics, Inc. is a manufacturer of amateur telescopes, mounts, and accessories.Founded in 1975 by former Sundstrand Corporation engineer Roland Christen, [1] the company is noted for its line of apochromatic refractors as well as high-end mounts.
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