Ads
related to: nexstar evolution 925 telescope partsproducts.bestreviews.com has been visited by 1M+ users in the past month
walmart.com has been visited by 1M+ users in the past month
Search results
Results from the WOW.Com Content Network
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.
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 ...
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.
For premium support please call: 800-290-4726 more ways to reach us
The telescope is usually fitted entirely inside the fork, although there are exceptions such as the Mount Wilson 2.5 m reflector, and there are no counterweights as with the German mount. The original English fork design is disadvantaged in that it does not allow the telescope to point too near the north or south celestial pole.
A star diagonal, erecting lens or diagonal mirror is an angled mirror or prism used in telescopes that allows viewing from a direction that is perpendicular to the usual eyepiece axis. It allows more convenient and comfortable viewing when the telescope is pointed at, or near the zenith (i.e. directly overhead). Also, the resulting image is ...
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.
Active optics is a technology used with reflecting telescopes developed in the 1980s, [1] which actively shapes a telescope's mirrors to prevent deformation due to external influences such as wind, temperature, and mechanical stress. Without active optics, the construction of 8 metre class telescopes is not possible, nor would telescopes with ...
Ads
related to: nexstar evolution 925 telescope partsproducts.bestreviews.com has been visited by 1M+ users in the past month
walmart.com has been visited by 1M+ users in the past month