Day or night telescope
This achromatic telescope has a mahogany barrel and a single brass draw tube. The other brass fittings include a sliding eyepiece cover and an objective lens cap. The maker's name is faintly engraved on the draw tube as 'J. Cox & Son, London'. The words 'Night or Day' are inscribed below, indicating that the telescope was designed for use in all light conditions and, therefore, has a relatively large objective lens to collect the maximum amount of light in poor seeing conditions.
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Object Details
ID: | NAV1651 |
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Collection: | Astronomical and navigational instruments |
Type: | Day or night telescope |
Display location: | Not on display |
Creator: | J. Cox & Son |
Date made: | circa 1800 |
Credit: | National Maritime Museum, Greenwich, London |
Measurements: | Overall: 508 mm; Diameter: 62 mm |
Parts: | Day or night telescope |