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  • 21 Aug, 2019

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File:Štefánik Observatory Zeiss Refractor.jpg
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current19:39, 30 September 2009Thumbnail for version as of 19:39, 30 September 20091,500 × 1,125 (192 KB)Vesta~commonswiki{{Information |Description={{en|1=Double refractor made by Zeiss in 1908, consisting of a photographic reafractor with 210mm aperture and a visual refractor with 180mm aperture. Both instruments have a focal length of 3400mm. This instrument was first use

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