F4456

Spyglass telescope with case Long Caption: Small Galilean telescope has a leather barrel and a single vellum draw tube. The other fittings are of brass and wood. Stop lines marked on the draw tube indicate the appropriate working lengths of the telescope according to the distance of the object being viewed. Credit line: © National Maritime Museum, Greenwich, London Object: NAV1688 Artist: unknown Date: circa 1798 Medium: brass; vellum; wood; glass Size: length: 82 mm (closed), 104 mm (open, to stop line, mamm x.); diameter: 36 mm (barrel), 37 mm (mamm x.) Click here to buy a bespoke print of this image.