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Portable telescope
The barrel of this non-achromatic telescope is covered in rayskin (shagreen) that has been dyed green, while the three draw tubes are made of white vellum. Stop lines marked with dots on the draw tubes indicate an optimum working length of the telescope of over 1000 mm. The brass fittings include sliding eyepiece and objective lens covers.
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Object Details
| ID: | NAV1519 |
|---|---|
| Collection: | Astronomical and navigational instruments |
| Type: | Portable telescope |
| Display location: | Not on display |
| Creator: | Unknown |
| Date made: | circa 1760 |
| Credit: | National Maritime Museum, Greenwich, London, Caird Collection |
| Measurements: | Overall: 346 mm; Diameter: 50 mm |
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