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Pocket telescope
This non-achromatic telescope has four draw tubes made of green vellum, while the barrel is covered in black sharkskin. The other fittings, including a sliding eyepiece lens cover, are made of turned wood and brass. Stop lines, shown by rings of black dots on the draw tubes, indicate the telescope's optimum working length. The objective lens is missing.
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Object Details
| ID: | NAV1552 |
|---|---|
| Collection: | Astronomical and navigational instruments |
| Type: | Pocket telescope |
| Display location: | Not on display |
| Creator: | Unknown |
| Date made: | circa 1750 |
| Credit: | National Maritime Museum, Greenwich, London, Caird Collection |
| Measurements: | Overall: 300 mm; Diameter: 48 mm |
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