Maker: Unknown

Year: 1675 c.25

Year Range: -

Year Notes:

Manufacturing Location: Unknown

Signature:

Signature Notes:

Inscriptions:

No stand present.

Collection: Louwman Collection of Historic Telescopes

Accession #: LC 16

Sources:

Tiemen Cocquyt, "400 Years of Telescopes" booklet, Zeeuws Museum, 2008. Item 6.

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. 58.

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. 35.

Public Notes:

"Early spyglass with fixed focus, made of bone.
Length 7.5 cm, Ø 2 cm. Presumably mid-seventeenth century" (Louwman and Zuidervaart, 2013, p. 35).

Length (open): 80

Length (closed):

F-ratio:

Exit pupil:

Object status:

Objective type: singlet

Optical style

Physical style pocket

Functional style

Materials: bone, glass

Drawtube data:

Drawtube notes:

Objective Data

Eyepieces

Notes: