Record Name | Ans_02775-057 |
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Photographer | Unbekannt |
Dating | 08.07.1892 |
Caption | Sunspot photo. 1892 Feb. 13-July 8. Instrument: Dallmeyer Photoheliograph. Place: Royal Observatory, Greenwich. Aperture: 4in., with negative. Focal length: Enlarging lens. Exposure: About 005 sec. |
Caption (German) | Sonnenflecken photo. 1892 Febr. 13.-Juli 8. Instrument: Dallmeyer Photoheliograph. Place: Royal Observatory, Greenwich. Aperture: 4in., with negative. Focal length: Enlarging lens. Exposure: About 005 sec. |
Physical description | Fotografie : Papierabzug, auf Karton montiert |
Format | Spezialmass |
Special size | 16 x 16 cm |
Colour | schwarz/weiss |
Orientation | Quadrat |
Categories |
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License | Public Domain Mark |
Copyright notice | ETH-Bibliothek Zürich, Bildarchiv / Fotograf: Unbekannt / Ans_02775-057 / Public Domain Mark |
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