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File:Galilei's newer telescope, part with lens, Museo Galileo, Florence, Inv. 2427, 224092.jpg

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Galilei's newer telescope. Designer and constructor: Galileo Galilei, ca 1610. Wood, paper, copper; length 1273 mm. Museo Galileo, Florence, Inv. 2427.

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English: Galilei's newer telescope, part with lens. Designer and constructor: Galileo Galilei, ca 1610. Wood, paper, copper; length 1273 mm. Museo Galileo, Florence, Inv. 2427. A telescope designed and built by Galileo Galilei around 1610. Wood, paper, copper. The double-convex lens has a diameter of 51 mm, is 2.5 mm thick in the middle and has a focal length of 1330 mm. The eyepiece consists of a plano-concave lens 26 mm in diameter, 3 mm thick in the middle and has a focal length of -94 mm. The magnification is therefore 14x, and the field of view is only 15 arc minutes (a quarter of a degree). The rest is made of wood, paper and copper.
Italiano: Cannocchiale di Galilei. Ideatore, costructore: Galileo Galilei, ca 1610. Legno, carta, rame; lungheza 1273 mm. Museo Galileo, Firenze, Inv. 2427.
Čeština: Dalekohled, který Galileo Galilei navrhnul a vyrobil asi už roku 1610. Část s objektivem. Dřevo, papír, měď. Oboustranně konvexní (dvojvypuklá) čočka objektivu má průměr 51 mm, uprostřed je tlustá 2,5 mm a má ohniskovou vzdálenost 1330 mm. Okulár je tvořen plankonkávní čočkou průměru 26 mm, uprostřed je tlustá 3 mm a má ohniskovou vzdálenost -94 mm. Zvětšení je tedy 14x, ostré zorné pole je pouze 15 úhlových minut (čtvrt stupně). Ostatní je ze dřeva, papíru a mědi.
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