Pocket telescope

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The barrel of this non-achromatic telescope is covered in rayskin (shagreen) that has been dyed red, while the three draw tubes are made of green vellum. Black stop lines on the draw tubes indicate the optimum working length of the telescope. The wood and brass fittings include sliding eyepiece and objective lens covers.

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Object Details

ID:	NAV1524
Collection:	Astronomical and navigational instruments
Type:	Pocket telescope
Display location:	Display - ROG
Creator:	Unknown
Date made:	circa 1750
Credit:	National Maritime Museum, Greenwich, London, Caird Collection
Measurements:	Length: 245 mm (closed), 655 mm (open to stop lines); Diameter: 36 mm (barrel)
Parts:	Pocket telescope Telescope lens (NAV1524.1) Telescope objective cap (NAV1524.2) Telescope eyepiece cap (NAV1524.3)