Maker: Unknown

Year: 1690 c.

Year Range: -

Year Notes:

Manufacturing Location:

Signature:

Signature Notes:

Inscriptions:

No stand present.

Collection: National Maritime Museum

Accession #: NAV1550

Sources:

Royal Museums Greenwich. "Non-achromatic telescope". http://collections.rmg.co.uk/collections/objects/43762.html [Accessed: June 2016].

Public Notes:

"This non-achromatic telescope has three draw tubes made of vellum. The barrel is also made of vellum and has tooled decoration. The other fittings are made of horn. Black stop lines on the draw tubes indicate the telescope's optimum working length" (Royal Museums Greenwich).

Length (open): 885

Length (closed): 330

F-ratio:

Exit pupil:

Object status:

Objective type: singlet

Optical style

Physical style

Functional style

Materials: vellum, horn, glass

Drawtube data:

Drawtube notes:

Diameter: 45 mm

Objective Data

Eyepieces

Notes: