Pocket telescope

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This non-achromatic telescope has three draw tubes made of green vellum and a leather barrel with gold-tooled decoration. The other fittings are made of lignum vitae and brass, including sliding objective and eyepiece lens covers. Stop lines on the draw tubes (shown by rings of black dots) indicate the telescope's optimum working length.

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Object Details

ID:	NAV1549
Collection:	Astronomical and navigational instruments
Type:	Pocket telescope
Display location:	Not on display
Creator:	Unknown
Date made:	circa 1710
Credit:	National Maritime Museum, Greenwich, London, Caird Collection
Measurements:	Overall: 235 mm; Diameter: 35 mm
Parts:	Pocket telescope Pocket telescope objective lens cap (NAV1549.1)