The problem is as you load up and have to tighten the lock on the clutch, Meade have put a very small sized bolt and thread to lock and people have found over time that they can damage the threads. There should be no problem piggy backing, however, Meade did 'under engineer' their clutch system on the dec drive and it has a tendancy to slip with heavier loads. I have found the need to upgrade the focuser and clutch mechanism, but optically stunning. THe LX200 is a good telescope but IMHO could have been manufactured better. The LX200 also comes with a zero shift micro focuser as well, don't know about the LX90. I have no experience of the LX90 but I believe the basic difference is in the substantial nature of the fork mount. To sum up in simple terms these new optics use hyperbolic primary and secondary mirrors to yield a very flat image for eyepice viewing or imaging.Īs for the difference between the LX90 and LX200, I have the 12" LX200R, and it's a beast of a machine with extremely heavy duty forks. The R signified 'Advanced Ritchey-Chrétien', a lengthy court battle later they have settled on the LX200 ACF which I think stands for Advanced coma free. The evolution of the optics on the LX200 went from the LX200 GPS to the LX200R. The difference between the 'old' and the ACF versions are the optics, whether your talking about the LX90 or the LX200.
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