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  2. Obsession Telescopes - Wikipedia

    en.wikipedia.org/wiki/Obsession_Telescopes

    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.

  3. List of telescope parts and construction - Wikipedia

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

    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.

  4. Optical Mechanics, Inc. - Wikipedia

    en.wikipedia.org/wiki/Optical_Mechanics,_Inc.

    OMI mirrors are used by other telescope makers such as Obsession Telescopes. [1] Also taking on custom projects, they produced the 48-inch Dob, a 48.875-inch-diameter (1,241.4 mm) aperture, f / 4, Dobsonian telescope called "Barbarella" and featured in Astronomy Technology Today magazine (June 2008 Issue). [2] [3] OMI is located in the US state ...

  5. How Telescopes Light Up the Invisible Parts of Our Universe ...

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

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

    F42 Mount, telescope, M2 (for 75mm mortar carriage, M1); Telescope, elbow, M3 (for 75mm mortar carriage, M1) – Parts and equipment F43 Sight, M1912, 2.95-inch mountain gun – Parts and equipment F44 Altimeter, M1917, M1920.

  7. Talk:Obsession Telescopes - Wikipedia

    en.wikipedia.org/wiki/Talk:Obsession_Telescopes

    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

  8. Side-by-side images from the James Webb and Hubble ... - AOL

    www.aol.com/side-side-images-james-webb...

    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 ...

  9. Edmund Scientific Corporation - Wikipedia

    en.wikipedia.org/wiki/Edmund_Scientific_Corporation

    The core of the company in this era remained surplus lenses. These were single-element lenses, shipped in 2.5-by-4.25-inch (64 mm × 108 mm) coin envelopes, with the approximate diameter and focal length stenciled on them. Reflecting their salvage and surplus origins, available diameters and focal lengths did not fall into regular progressions.