File:Dollond Heliometer 1790.jpg
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Original file (4,608 × 3,072 pixels, file size: 5.24 MB, MIME type: image/jpeg)
Summary
| Description |
English: Heliometer lens, Dollond, London, around 1790. 16 x 6.8 cm (University Observatory Vienna). The lens was placed in front of a refractor of 6.7 cm aperture.
Deutsch: Heliometerobjektiv von Dollond, London, um 1790. Maße: 16 x 6.8 cm. Die Linse wurde mit einem 6.7cm-Refraktor von Dollond verwendet. (Universitätssternwarte Wien) |
| Date | |
| Source | Own work |
| Author | Wrongfilter |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:06, 13 January 2018 | | 4,608 × 3,072 (5.24 MB) | wikimediacommons>Wrongfilter | {{Information |Description ={{en|1=Heliometer lens, Dollond, London, around 1790. 16 x 6.8 cm (University Observatory Vienna). The lens was placed in front of a refractor of 6.7 cm aperture.}} {{de|1=Heliometerobjektiv von Dollond, London, um 1790.... |
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