Ramsden, Jesse, 1780 c.
Mathematisch-Physikalischer Salon / Staatliche Kunstsammlungen Dresden Arrow right Arrow left
Basic Info

Maker: Ramsden, Jesse

Year: 1780 c.

Year Range: -

Year Notes:

Manufacturing Location: London, England

Signature: J. Ramsden London

Signature Notes:


Stand present.

Collection: Mathematisch-Physikalischer Salon / Staatliche Kunstsammlungen Dresden

Accession #: CIF 6


Helmut Schramm, Astronomische Instrumente Katalogue, Staatlicher Mathematisch-Physikalischer Salon, Dresden, Zwinger, item 29, pg. 21.

Public Notes:

A three-footed tripod of 1035 mm in height with cross-braces and assembled with brass screws. The lower outer column has a height of 484 mm and 645 mm and 51 mm lower and upper diameter. Azimuthal mount. Objective tube of mahogany. Ocular tube of brass. Objective lens a simple biconvex.

Length (open): 750

Length (closed): 670


Exit pupil:

Object status:

Optical Basics

Objective type: singlet

Optical style astronomical

Physical style

Functional style

Materials: mahogany, wood, glass, brass

Optical/Lab Data

Drawtube data:

Drawtube notes:

Objective Data

CA curvature (diopters): CB curvature (diopters): PD lens power (diopters): fD focal length (mm): t thickness (mm): free aperture (mm): full aperture (mm): nD refractive index: ν Abbe No.:
Lens 1 9.00 740.00 75.80