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Kunitomo Ikkansai : ウィキペディア英語版
Kunitomo Ikkansai

was a Japanese gun manufacturer of the early 19th century, who, after having spent several months in Edo, where he could get accustomed with Dutch wares, built Japan's first reflective telescope in 1831. It was of the Gregorian type.
Kunitomo's telescope had a magnification of 60, and allowed him to make very detailed studies of sun spots and lunar topography. Four of his telescopes remain to this day.
Kunimoto also developed manufacturing methods for guns, and also created an air gun based on rangaku knowledge acquired from the Dutch in Dejima.
== Other uses of the name ==

*6100 Kunitomoikkansai, a main belt asteroid discovered in 1991, is named after Kunitomo Ikkansai.

Image:Kunitomo1832Telescope.jpg|Kunitomo’s reflecting telescope, 1831.
Image:KunitomoMoon1836.jpg|Observation of the moon by Kunitomo in 1836.
Image:KunitomoAirGun.jpg|Air gun developed by Kunitomo, circa 1820–1830.
Image:KunitomoAirGunMechanism.jpg|Air gun trigger mechanism.




抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Kunitomo Ikkansai」の詳細全文を読む



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