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In 2007, Obsession Telescopes released a second series of telescopes more portable than their original design. They designated this series as Ultra Compact (UC), referring to their former one as 'Classic.' From 2009-2012 their telescopes ranged from USD 3000 for a 12.5 inch telescope, up to USD 12–15,000 for a 25-inch telescope.
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.
Refracting telescopes use a lens to focus light. The Swedish 1-m Solar Telescope, with a lens diameter of 43 inches, is technically the largest, with 39 inches clear for the aperture.The second largest refracting telescope in the world is the Yerkes Observatory 40 inch (102 cm) refractor, used for astronomical and scientific observation for ...
Obsession's New 18-inch scope by John Shibley Astronomy Magazine April 2008, Equipment review for the Obsession Ultra Compact 18 f/4.2 telescope Kalmbach Publishing 800-446-5489 Obsession Telescopes A New Obsession Introduction of Obsession 18 f/4.2 UC Astronomy Technology Today May 2007 info@astronomytechnologytoday.com
This is a list of large optical telescopes. For telescopes larger than 3 meters in aperture see List of largest optical reflecting telescopes. This list combines large or expensive reflecting telescopes from any era, as what constitutes famous reflector has changed over time.
A 25-inch (63.5 cm) objective refractor was installed in the Newall telescope. [18] This had an objective made by the makers Chance, with the overall telescope made by Thomas Cooke. [21] The telescope was made for Robert Stirling Newall, and when completed in 1869 was the largest refracting telescope in the world. [21]
NASA's James Webb Space Telescope is by far the most powerful observatory ever launched into space.. Even Webb's very first images show why NASA spent 25 years and $10 billion. The Hubble Space ...
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.