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CELESTRON NEWTONIAN 910MM TELESCOPE MANUAL PDF PORTABLE
Dobson combined all these innovations in a design focused towards one goal: building a very large, inexpensive, easy to use, portable telescope, one that could bring deep-sky astronomy to the masses. Since he built these telescopes as aids in his avocation of instructional sidewalk astronomy, he preferred to call the design a "sidewalk telescope". "for hundreds of years, wars were fought using cannon on 'Dobsonian' mounts".ĭobson identified the characteristic features of the design as lightweight objective mirrors made of porthole glass, and mountings constructed from plywood, Teflon strips and other low-cost materials. John Dobson, credited as having invented this design in 1965 pointed out that In the field of amateur telescope making most, if not all, of its design features had been used before. It is hard to classify the Dobsonian Telescope as a single invention.
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