Day or night telescope

This achromatic navigational telescope has a leather-covered barrel and a single brass draw tube. The other fittings are also brass and include an objective lens cap, a pivoted eyepiece cover and a sliding sunshade. The maker's name is inscribed on the draw tube - 'Dollond London' - as are the words 'Day or Night', indicating that the telescope was designed for use in all light conditions.

Object Details

ID: NAV1625
Collection: Astronomical and navigational instruments
Type: Day or night telescope
Display location: Not on display
Creator: Dollond & Aitchison
Date made: circa 1830
Credit: National Maritime Museum, Greenwich, London
Measurements: Length: 534 mm (closed, with cap), 926 mm (fully extended); Diameter: 63 mm (barrel), 66 mm (max.)
Parts: Day or night telescope