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Polygonal telescope
The decagonal barrel of this non-achromatic telescope is made of mahogany and is tapered. It has a single brass draw tube and brass fittings, including a sliding objective lens cover, of which the slide is missing. The eyepiece is also missing.
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Object details
| ID: | NAV1593 |
|---|---|
| Collection: | Astronomical and navigational instruments |
| Type: | Polygonal telescope |
| Display location: | Not on display |
| Creator: | Unknown |
| Date made: | circa 1770 |
| Credit: | National Maritime Museum, Greenwich, London, Caird Collection |
| Measurements: | Overall: 672 mm; Diameter: 52 mm |