File:Telescope optics.jpg
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Telescope_optics.jpg (642 × 210 pixels, file size: 19 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 06:02, 12 September 2011 | 642 × 210 (19 KB) | WikiSysop (talk | contribs) |
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