Passemant, Claude Simeon
Louwman Collection of Historic Telescopes Arrow right Arrow left

photo - whole telescope
Basic Info

Maker: Passemant, Claude Simeon


Year Range: 1765-1769

Year Notes:

Manufacturing Location: Paris, France

Signature: Passemant au Louvre

Signature Notes:


No stand present.

Collection: Louwman Collection of Historic Telescopes

Accession #: LC 163


Project investigation

Cocquyt, Tiemen. "400 Years of Telescopes" booklet, Zeeuws Museum, 2008. Item 35.

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.146. #163.

Public Notes:

"Achromatic telescope with an early ‘triplet’ objective lens and an eyepiece with three possible magnifications. One of these can be selected by means of a rotating crenated gear wheel. All tubes covered with tortoise-shell, with silver frames. Signed: ‘Passemant au Louvre’. Length 9-18 cm, Ø 4.5 cm. Made in the years 1765-1769" (Louwman and Zuidervaart, 2013).

Position in image: On the bottom part of the image.

Length (open): 180

Length (closed): 90


Exit pupil:

Object status:

Optical Basics

Objective type: triplet

Optical style

Physical style pocket

Functional style

Materials: silver, glass, tortoiseshell

Optical/Lab Data

Drawtube data:

Drawtube notes:

Objective Data