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The tube assembly is a Newtonian regardless of what type of mount it is on.
The term Dobsonian came into being when an American called John Dobson
put Newts onto the very simple alt/az mount that now bears his name, in
order to make cheap scopes that he and his colleagues called "The Sidewalk
Astronomers" took around the city streets to try and get the general public
into Astronomy.
raymo
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