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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.
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.
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 ...
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
The smallest RCOS telescope, the 12.5 inch F/9 Ritchey-Chrétien had a base price of just over twenty thousand US dollars in 2009, with large and/or custom models costing considerably more. RC Optical Systems and Star Instruments won a lawsuit in 2008 against Meade Instruments over Meade's description of RCX400 and LX200R telescopes and the ...
28-inch Refractor (1893) Thompson Telescope with a 26-inch refractor and 30-inch reflector on one mounting (1896) Lassell 2-foot Reflector (1845) Isaac Roberts 20-inch reflector (1885) Western Equatorial (c.1824) 13-inch Astrographic Refractor (1890) Merz 12.8-inch Visual Refractor (1859-1893) (this was replaced by the 28 inch Grubb in the ...
Ritchey 24" reflecting Telescope. George Willis Ritchey (December 31, 1864 – November 4, 1945) was an American optician and telescope maker and astronomer born at Tuppers Plains, Ohio. [1] [2] Ritchey was educated as a furniture maker. He coinvented the Ritchey–Chrétien (R–C) reflecting telescope along with Henri Chrétien. The R-C ...
The 24-inch (610 mm) Dobsonian telescope brought by the Sidewalk Astronomers was unconventional, because most telescopes at such meetings tended to be smaller, on equatorial mounts, and designed for astrophotography rather than optical viewing. Surprisingly (and controversially at the time) Dobson's telescope tied in first prize for best optics.