Maker: Dollond

Year: 1770 c.

Year Range: -

Year Notes:

Manufacturing Location: London, England

Signature:

Signature Notes:

Inscriptions:

Stand present.

Collection: National Maritime Museum

Accession #: AST0922

Sources:

Royal Museums Greenwich. "Portable refractor telescope". http://collections.rmg.co.uk/collections/objects/11084.html [Accessed June 2016].

Public Notes:

"This is a portable refracting telescope with a stand. Telescope: The barrel is made from mahogany and brass. The eyepiece has a screw-on shade. The focus adjusting mechanism works by means of a brass screw on the side of the barrel which extends the eyepiece. It has an object cap and an achromatic object glass. The length with the eyepiece when extended with the object cap is 1011 mm. The height to the top of the barrel is 495 mm. The diameter of the barrel is 60 mm. Stand: The telescope is mounted on a pillar stand with three folding claw legs. It can be dismantled for storage purposes. It has adjustable inclination and rotary movement (or altitude and azimuth movement). Box and accessories: The oak box length is 790 mm. The box contains a spare lens with a cap and a key with an ivory handle for making adjustments. The spare eyepiece is missing" (Royal Museums Greenwich).

Length (open): 1011

Length (closed):

F-ratio:

Exit pupil:

Object status:

Objective type: unconfirmed

Optical style

Physical style

Functional style

Materials: ivory, mahogany, glass, brass

Drawtube data:

Drawtube notes:

Barrel Diameter: 60 mm. Barrel Height: 495 mm.

Objective Data

Eyepieces

Notes: