Ads
related to: obsession 20 inch telescope mirror set
Search results
Results From The WOW.Com Content Network
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.
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 ...
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.
The main material used early on for reflecting telescope mirrors was speculum metal, which reflected only about two-thirds of the incident light, and which tarnished, requiring maintenance. Two-element refracting telescopes were extensively used in 19th century observatories despite their smaller apertures than metal, and later glass, mirror ...
In astronomy, it is used for mirror substrates in large telescopes such as the Hobby-Eberly Telescope, [7] the Keck I and Keck II telescopes, [8] the Gran Telescopio Canarias, [9] the Devasthal Optical Telescope, [10] the European Southern Observatory's 8.2 m Very Large Telescope, [11] and the 39 m Extremely Large Telescope. [12]
Ultimately, a valid comparison between two telescopes must take into consideration more specifications, when a general measurement becomes obtuse. Aperture of the primary mirror alone can be poor measure of a reflective telescope's significance; for example, the Hubble Space Telescope has only a 2.4 metres (94 in) primary mirror. In addition ...