Dr. Erhard Hänssgen’s 42 inch (107 cm) Dobsonian Telescope

Dr. Erhard Hänssgen’s 42 inch (107 cm) Dobsonian Telescope

Dr. Erhard Hänssgen’s 42 inch (107 cm) Dobsonian Telescope

Portrait of Dr. Erhard Hänssgen’s 42 inch (107 cm) Dobsonian Telescope

Source: www.cruxis.com/scope/scope1070.htm

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http://www.cruxis.com/scope/scope1070_construction.htm

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