File:PSM V45 D233 Negative and positive eyepieces.jpg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 10:40, 18 February 2011 | 1,486 × 357 (23 KB) | Ineuw | {{Information |Description = Negative and positive eyepieces |Source = [http://www.archive.org/details/popularsciencemo45newy Popular Science Monthly Volume 45] |Date = 1894 |Author = Unknown |Permission = {{PD-old}} |
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