Pocket telescope

This non-achromatic telescope has five draw tubes. The barrel is covered with sharkskin and is intricately decorated with silver pins. The draw tubes are made of hand-coloured vellum with fittings made of horn and silver and the eyepiece lens is set in a horn mount. The objective lens and possibly a lens cap are missing.

The name 'JOHN MA' is stamped on several tubes, suggesting that it was made by John Marshall, one of the leading opticians in London. He was a contemporary of Robert Hooke and worked in Ludgate Street.

Object Details

ID: NAV1515
Collection: Astronomical and navigational instruments
Type: Pocket telescope
Display location: Not on display
Creator: Marshall, John
Date made: circa 1700
Credit: National Maritime Museum, Greenwich, London, Caird Collection
Measurements: Length: 304 mm (closed); 909 mm (open to stop lines); Diameter: 44 mm (barrel)