The Sky-Watcher Classic Dobsonian Telescope 254mm/1200mm (10") has a "paraboloidal" primary mirror to eliminate spherical aberration and a four-arm...
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The Sky-Watcher Classic Dobsonian Telescope 203mm/1200mm (8") has a "paraboloidal" primary mirror to eliminate spherical aberration and a four-arm,...
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The Sky-Watcher Classic Dobsonian Telescope 153mm/1200mm (6") has a "paraboloidal" primary mirror to eliminate spherical aberration and a four-arm,...
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