They were first produced in 90 mm (3-1/2") Maksutov Cassegrain telescope in 1996. Meade currently produces a line of Maksutov telescopes under their ETX series (Everybody's Telescope). The Meade "ETX" series Maksutov-Cassegrain telescope (105mm aperture). LX400-ACF, 16 to 20" f/8, w/ robotic equatorial mount.LX200-ACF, a series of LX200 with ACF Optics 8" to 16".After a legal settlement Meade dropped the claim. Meade's literature originally describe their ACF as a variation on the Ritchey-Chrétien telescope, although it does not use the two hyperbolic mirror combination in that design (being more of an aplantic design). In the new design the full aperture corrector is slightly altered in shape and combined with a spherical primary mirror. Products produced by Meade include: Catadioptric cassegrains ACF TelescopesĪCF ( Advanced Coma-Free) is an altered version of the Meade's previous schmidt-cassegrain telescopes that replaces the traditional spherical schmidt-cassegrain secondary mirror with a hyperbolic secondary mirror. Meade manufactured its products formerly in Irvine, California, and currently in an expanded plant in Tijuana, Mexico. ProductsĪ 40 cm Meade LX200 in the York University Observatory 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). Meade has a long history of litigation with other companies over infringement of their patents, particularly with its once bitter rival Celestron. In 1980 the company ventured into the Schmidt-Cassegrain market that up to that time had been dominated by Celestron Corporation. Meade started manufacturing its own line of products in 1976, introducing 6" and 8" reflecting telescopes models in 1977. Founded in 1972 by John Diebel, Meade started out as a mail order seller of small refracting telescopes and telescope accessories manufactured by the Japan based Towa Optical Manufacturing Company.
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