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杜布森望遠鏡

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道布森望遠鏡
道布森望遠鏡

道布森望遠鏡特指一種利用簡單經緯儀 (天文)承托的反射望遠鏡,外形與大炮相似,由美國天文愛好者約翰·道布森於1950年代開始製作,在1980年代被廣泛提倡藉以普及天文學。由於成本低廉,結構簡單堅固且方便攜帶,因此十分適合天文愛好者自行製作。

原則上,道布森望遠鏡沒有限制望遠鏡的光學設計,但一般均為牛頓式反射望遠鏡,口徑由10厘米至超過1米的均有。大型的道布森望遠鏡為了減輕重量,不少採用桁架式設計。這種望遠鏡一般沒有安裝追蹤裝置,因此主要用於目視觀測,其光學面多為拋物面焦比可至F4-F6,聚光力較強,尤其適合於低倍的深空天體觀測。不過,亦有人為此類望遠鏡加裝跟踪系統,用作高倍行星觀測或行星攝影及月面攝影。

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杜布森望遠鏡
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