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Pocket telescope
This non-achromatic telescope has a barrel made of mottled vellum with gold-tooled decoration. The three draw tubes are of plain vellum and have black stop lines drawn onto them, indicating the working length of the telescope. The turned wooden fittings include a screw-on objective lens cap.
The ferrules or collars of the draw tubes were made by curring sections from the tube that made the barrel - they are of the same diameter and the mottled pattern matches that of the barrel. This suggests that the telescope was made earlier than 1660.
The ferrules or collars of the draw tubes were made by curring sections from the tube that made the barrel - they are of the same diameter and the mottled pattern matches that of the barrel. This suggests that the telescope was made earlier than 1660.
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Object Details
| ID: | NAV1548 |
|---|---|
| Collection: | Astronomical and navigational instruments |
| Type: | Pocket telescope |
| Display location: | Not on display |
| Creator: | Unknown |
| Date made: | circa 1660; ca.1680 |
| Credit: | National Maritime Museum, Greenwich, London, Caird Collection |
| Measurements: | Length: 280 mm (closed, with cap), 664 mm (open, to stop lines, max); Diameter: 35 mm (barrel), 48 mm (max) |
| Parts: | Pocket telescope |