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Meade has a long history of litigation with other companies over infringement of their patents, particularly with its once bitter rival Celestron. In August 2008, Meade modified their line of Schmidt-Cassegrain telescopes with changes to the optical surfaces in design they call "Advanced Coma-Free optics" (ACF Optics). [6]
The ETX started out as a 90 mm (3-1/2") Maksutov Cassegrain telescope (first produced in 1996) and took advantage of high volume mass production and simplified optical and parts construction to open a new market for a cheap alternative to the very expensive Questar 3-1/2 Maksutov Cassegrain [1] [2] The ETX "line" has been expanded to 105 mm, and 125 mm Maksutov Cassegrains and achromatic ...
Meade Instruments would eventually become the world's largest telescope manufacturer for amateur astronomy, with distribution in over thirty countries. Diebel received the Franklin Institute's Bower Award for Business Leadership in 1998 [ 1 ] and retired from Meade Instruments in 2003.
The Meade LX200 is a family of commercial telescopes produced by Meade Instruments launched in 1992 with 8" (20.32 cm) and a 10" (25.4 cm) Schmidt–Cassegrain models on computerized altazimuth mounts. [1] [2] Two larger models, a 12" (30.48 cm) and a 16" (40.64 cm), quickly followed.
1917 – Mount Wilson 100-inch (2.5 m) optical reflecting telescope begins operation, located in Mount Wilson, California; 1918 – 1.8m Plaskett Telescope begins operation at the Dominion Astrophysical Observatory, Victoria, British Columbia, Canada; 1919 – International Astronomical Union (IAU) founded
1672 — Laurent Cassegrain, produces a design for a reflecting telescope using a paraboloid primary mirror and a hyperboloid secondary mirror. The design, named 'Cassegrain', is still used in astronomical telescopes used in observatories in 2006. 1674 — Robert Hooke produces a reflecting telescope based on the Gregorian design.
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The Meade LX90 is a Schmidt-Cassegrain design of telescope made by Meade Instruments for the mid-priced (2000 USD circa 2008) commercial telescope market. [1] [2] It uses a similar optical system to the bigger and more expensive Meade LX200 [2] —although it lacks some useful functions like primary mirror locking.