Pocket telescope

This non-achromatic telescope has three draw tubes. The vellum barrel has been dyed with a red and green mottled pattern and is further decorated with gold-tooled motifs. The other fittings are of turned wood. The ring around the largest draw tube appears to be of the same diameter as the barrel, which is a feature of telescopes made before about 1660.

The screw-on caps for the eyepiece and objective lenses are both missing, and the objective lens appears to be a modern replacement.

The relatively short length of the telescope when in use suggests that it was meant for terrestrial rather than astronomical use.

Object Details

ID: NAV1553
Collection: Astronomical and navigational instruments
Type: Pocket telescope
Display location: Not on display
Creator: Unknown
Date made: circa 1660; circa 1680
Credit: National Maritime Museum, Greenwich, London, Caird Collection
Measurements: Length: 232 mm (closed), 604 mm (open, approx); Diameter: 35 mm (barrel)