Negative enlarging lens
The Negative Lens has been marked with ZBA0713.1 and the box has been marked with ZBA0713.2. Negative lens, ie used to shorten the focal length. Possibly part of a transit circle or photoheliograph. Lens labelled 'Special 16in Negative No 61035'. Box labelled 'BOOKS - TO BE KEPT DRY [print], Negative Enlarging lens/ 4 inches aperture/ 16inches focus [handwritten]/ FROM THE ASTRONOMER ROYAL, ROYAL OBSERVATORY, GREENWICH, LONDON SE10 [print]/ (ex Solar Dome Dec 1979) [handwritten]'
Object Details
| ID: | ZBA0713 |
|---|---|
| Collection: | Astronomical and navigational instruments |
| Type: | Negative enlarging lens |
| Display location: | Not on display |
| Creator: | Dallmeyer, J. H. |
| Date made: | circa 1870 |
| People: | Dallmeyer, J. H.; Dallmeyer, J. H. |
| Credit: | Components. National Maritime Museum, Greenwich, London, RGO Collection |
| Measurements: | Overall: 50 mm; Box: 84 mm x 177 mm x 177 mm; Diameter: 150 mm |
| Parts: | Negative enlarging lens |