Pocket telescope

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

Object Details

ID: NAV1527
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: Overall: 232 mm; Diameter: 35 mm