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Originally Posted by PeteMo
What confuses me now is that according to one web site, the Tasco, SkyWatcher scopes are all low quality scopes, which seems to be supported by the rack & pinion focuser.
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Tasco, Skywatcher, Saxon, Orion etc are just importers that stick their name on a whole bunch of stuff. Some of it good, some bad, some so-so. The focuser is a bolt-on item and whether its one type or another says nothing about the quality of the optics. The GSO Dobs that come with R&Ps have exactly the same optics as those with crayfords.
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How can we be sure what the mirror is made of and where it is made when so many manufacturer web sites contain errors?
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I have discussed it with John Izzo from Telescope Shed and he assures me that the Saxon 10" Dobs he sells have US made pyrex mirrors.