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The same tube is not called different things Peter; the name Dobsonian
is the name given to the whole assembly of a Newt mounted on a simple
lazy Susan[in effect an alt/az mount]. I suppose it is a little confusing because there is no name given to the whole assembly of a Newt on an EQ mount. The Dobsonian is named after John Dobson who built them as a cheap
way of getting into large [as in huge] scopes.
raymo
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