File:Štefánik Observatory Zeiss Refractor.jpg
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English: 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 used by König in Vienna, and was relocated to the Štefánik Observatory in Prague in 1928, where it is still in use today. |
| Date | |
| Source | Own work |
| Author | H. Raab (User:Vesta) |
| Camera location |  | View this and other nearby images on: OpenStreetMap |  |
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. |
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| current | 19:39, 30 September 2009 | | 1,500 × 1,125 (192 KB) | Vesta~commonswiki (talk | contribs) | {{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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