Maker: Martin, Benjamin

Year: 1779 c.

Year Range: -

Year Notes:

Manufacturing Location: London, England

Signature: B. MARTIN / LONDON

Signature Notes:

Inscriptions:

No stand present.

Collection: Louwman Collection of Historic Telescopes

Accession #: LC 51

Sources:

Louwman, P.J.K., and Zuidervaart, H.J., "A Certain Instrument to See Far: Four Centuries of Styling the Telescope Illustrated by a Selection of Treasures from the Louwman Collection of Historic Telescopes". Wassenaar, 2009. p.73. #55.
Louwman, P.J.K., and Zuidervaart, H.J., "A Certain Instrument for Seeing Far: Four Centuries of Styling the Telescope Illustrated by a Selection of Treasures from the Louwman Collection of Historic Telescopes". Wassenaar, 2013. p.80. #51

Public Notes:

Main tube covered with green coloured ray skin. Three green coloured drawtubes. Brass ferrules and fittings with slides. Signed on the longest drawtube: ‘B. MARTIN / LONDON’. Magnification ca. 7 times. Third quarter of the eighteenth century . The instrument maker and ‘country showman’ Benjamin Martin (1704-1782) was not only one of the most renowned English popularizers of natural philosophy , but was also important as an innovative instrument maker, especially on the field of microscopy (Louwman and Zuidervaart, 2013).

Length (open): 430

Length (closed): 170

F-ratio:

Exit pupil:

Object status:

Objective type: singlet

Optical style

Physical style

Functional style

Materials: rayskin, brass

Drawtube data:

Drawtube notes:

Objective Data

Eyepieces

Notes: