Maker: Unknown

Year: 1760 c.

Year Range: -

Year Notes:

Manufacturing Location:

Signature:

Signature Notes:

Inscriptions:

No stand present.

Collection: National Maritime Museum

Accession #: NAV1519

Sources:

Royal Museums Greenwich. "Non-achromatic telescope". http://collections.rmg.co.uk/collections/objects/43731.html [Accessed: June 2016].

Public Notes:

"The barrel of this non-achromatic telescope is covered in rayskin (shagreen) that has been dyed green, while the three draw tubes are made of white vellum. Stop lines marked with dots on the draw tubes indicate an optimum working length of the telescope of over 1000 mm. The brass fittings include sliding eyepiece and objective lens covers" (Royal Museums Greenwich).

Length (open): 346

Length (closed):

F-ratio:

Exit pupil:

Object status:

Objective type: singlet

Optical style

Physical style

Functional style

Materials: shagreen, vellum, glass, brass

Drawtube data:

Drawtube notes:

Diameter: 50 mm

Objective Data

Eyepieces

Notes: