Maker: Unknown

Year: 1770 c.

Year Range: -

Year Notes:

Manufacturing Location: England

Signature:

Signature Notes:

Inscriptions:

No stand present.

Collection: National Maritime Museum

Accession #: NAV1593

Sources:

Royal Museums Greenwich. "Non-achromatic telescope". http://collections.rmg.co.uk/collections/objects/43805.html [Accessed: June 2016].

Public Notes:

"The decagonal barrel of this non-achromatic telescope is made of mahogany and is tapered. It has a single brass draw tube and brass fittings, including a sliding objective lens cover, of which the slide is missing. The eyepiece is also missing" (Royal Museums Greenwich).

Length (open):

Length (closed): 672

F-ratio:

Exit pupil:

Object status:

Objective type: unconfirmed

Optical style

Physical style polygonal

Functional style

Materials: mahogany, glass, brass

Drawtube data:

Drawtube notes:

Diameter: 52 mm

Objective Data

Eyepieces

Notes: