Maker: Unknown

Year: 1750 c.

Year Range: -

Year Notes:

Manufacturing Location: England

Signature:

Signature Notes:

Inscriptions:

No stand present.

Collection: National Maritime Museum

Accession #: NAV1527

Sources:

Royal Museums Greenwich. "Non-achromatic telescope". http://collections.rmg.co.uk/collections/objects/43739.html [Accessed: June 2016].

Public Notes:

"The barrel of this non-achromatic telescope is covered in rayskin (shagreen) that has been dyed green, and the three draw tubes are made of green vellum. Black stop lines marked by rings of dots on the draw tubes indicate the optimum working length of the telescope. The black ivory and brass fittings include sliding eyepiece and objective lens covers" (Royal Museums Greenwich).

Provenance:

Caird Collection

Length (open):

Length (closed): 232

F-ratio:

Exit pupil:

Object status:

Objective type: singlet

Optical style

Physical style

Functional style

Materials: black ivory, rayskin, shagreen, vellum, glass, brass

Drawtube data:

Drawtube notes:

Diameter: 35 mm

Objective Data

Eyepieces

Notes: