Unknown, 1750 c.
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photo - whole telescope
Basic Info

Maker: Unknown

Year: 1750 c.

Year Range: -

Year Notes:

Manufacturing Location: France


Signature Notes:


No stand present.

Collection: National Maritime Museum

Accession #: NAV1524


Royal Museums Greenwich. "Non-achromatic telescope". http://collections.rmg.co.uk/collections/objects/43736.html [Accessed: June 2016].

Public Notes:

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

Length (open): 655

Length (closed): 245


Exit pupil:

Object status:

Optical Basics

Objective type: N/A

Optical style

Physical style

Functional style

Materials: rayskin, vellum, brass, glass, wood, shagreen

Optical/Lab Data

Drawtube data:

Drawtube notes:

Diameter: 36 mm (barrel)

Objective Data