F4554

Variable power telescope Long Caption: The barrel of this achromatic telescope is covered in pigskin, while the other fittings are made of brass. The telescope's magnifying power can be adjusted by turning two milled rings at the eyepiece end - one to change the magnification, the other for focusing. Credit line: © National Maritime Museum, Greenwich, London Object: NAV1580 Artist: unknown Date: circa 1890 Medium: pigskin; brass; glass Size: length: 653 mm (closed), 671 mm (fully emm xtended); diameter: 62 mm (barrel) Click here to buy a bespoke print of this image.