Maker: Dollond

Year: 1770 c.

Year Range: -

Year Notes:

Manufacturing Location: London, England

Signature: DOLLOND * LONDON

Signature Notes:

Signed around one of the eyepieces with a * in between Dollond and London

Inscriptions:

No stand present.

Collection: National Maritime Museum

Accession #: AST0927

Sources:

Royal Museums Greenwich. "Achromatic telescopes". http://collections.rmg.co.uk/collections/objects/11089.html. [Accessed June 2016]

Public Notes:

"This is a brass double achromatic telescope, with a missing tripod stand. The telescope has a fitted mahogany box which contains in addition to the telescope tube a counterpoise clamp, object glass cap, small refracting sighting telescope (mounted on the eye end of the barrel), six eyepiece shades (two with caps), a terrestrial eyepiece, fittings for supporting the telescope. The telescope has an object glass diameter of 95mm and a focal length of 60 inches. The mahogany box has an overall length of 1677mm and has brass handles" (Royal Museums Greenwich).

Length (open):

Length (closed):

F-ratio:

Exit pupil:

Object status:

Objective type: doublet (unknown)

Optical style terrestrial

Physical style

Functional style

Materials: glass, brass

Drawtube data:

Drawtube notes:

Overall: 1568 x 95 mm

Objective Data

Eyepieces

Notes: