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Description: | 'Pathological set' of twelve objective lenses, each lens with a known defect, in fitted box, with separate telescope, all by Cooke, Troughton & Simms Ltd, for demonstrating the effects of imperfect lenses, probably c. 1920-1939. Also three home-made 'artificial stars' consisting of ball bearings mounted on rods on a wooden base. (One lens cracked.) | License: | http://creativecommons.org/licenses/by-nc-sa/2.5/ | Subjects: | objective lens | Temporal: | 1920-1939 (estimated) | Source: | Science Museum | Creator: | Cooke, Troughton and Simms Limited | Identifier: | 2002-423 | Go to resource |
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