Meade - LX90GPS
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Instruction Manual 8 10 12 LX90GPS Schmidt Cassegrain Telescopes AutoStar GPS SmartFinder InT LEVEL NORTH TECHNOLOGY The Meade Schmidt Cassegrain Optical System In the Schmidt Cassegrain design ot the Meade LX90 light enters trom the right passes through a thin lens with 2 sided aspheric correction correcting plate proceeds to a spherical primary mirror and then to a convex secondary mirror The convex secondary mirror multiplies the eftective tocal length ot the primary mirror and results in a tocus at the focal plane with light passing through a central perforation in the primary mirror The Meade LX90 Schmidt Cassegrain includes an oversize primary mirror ot an 8 25 diameter yielding a tuily illuminat ed field ot view sig ...