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dobsonian

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    Choosing and Using a Dobsonian Telescope

    Free Download Choosing and Using a Dobsonian Telescope by Neil English English | PDF | 2011 | 239 Pages | ISBN : 1441987851 | 10.6 MB In the 1960's, American amateur astronomer, John Dobson, designed a revolutionary kind of astronomical telescope featuring a lightweight large-aperture reflecting...
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