Telescopes, Astronomical and navigational instruments, Optical equipment

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Night telescope

NAV1485
Telescopes

Object connections:

Collection Telescopes, Astronomical and navigational instruments, Optical equipment
User collections Stories from the sea by rboley
Gallery locationNot on display

Object details:

Object ID NAV1485
Description This is a hand-held terrestrial telescope designed for use at night. It has a large non-achromatic objective lens to allow as much light as possible to enter the telescope. The telescope doesn’t have extra lenses to correct the inversion of the image, since the more lenses a telescope has, the greater the loss of light. The production of inverted images is typical of night telescopes. The telescope has a leather-covered barrel and a single brass draw tube with a mechanical stop. The maker's name and the type of telescope are engraved on the draw tube: 'Cary, London. / NIGHT'. The eyepiece has a pivoted cover but the objective lens cap is missing.
Date made circa 1810

Artist/Maker Cary, William
Place made England: London
Credit National Maritime Museum, Greenwich, London
Materials brass; glass; leather
Measurements Overall: 710 mm; Diameter: 81 mm
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