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Polygonal telescope
This non-achromatic telescope has an octagonal wooden barrel and a single brass draw tube. The other brass fittings include sliding eyepiece and objective lens covers.
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Object details
| ID: | ZBA1206 |
|---|---|
| Collection: | Astronomical and navigational instruments |
| Type: | Polygonal telescope |
| Display location: | Not on display |
| Creator: | Troughton & Simms; Unknown |
| Date made: | circa 1750 |
| People: | Airy, George Biddell |
| Credit: | National Maritime Museum, Greenwich, London, Airy Collection |
| Measurements: | Length: 347 mm (closed); 597 mm (fully extended); Diameter: 36 mm (barrel), 38 mm (max) |