Maker: Unknown

Year: 1690

Year Range: -

Year Notes:

Manufacturing Location: Unknown

Signature:

Signature Notes:

Inscriptions:

No stand present.

Collection: Mathematisch-Physikalischer Salon / Staatliche Kunstsammlungen Dresden

Accession #: CIF 63

Sources:

Helmut Schramm, Astronomische Instrumente Katalogue, Staatlicher Mathematisch-Physikalischer Salon, Dresden, Zwinger, item 6, pg. 15. Field research.

Public Notes:

Objective is heavily stopped down with green paper stop. Ronchigram shows central portion has defects, rendering image problematic.

6 draws. Draws are covered with swirling, linear patterns.

From catalogue: Tubes of paper. Objective tube with cover of red parchment, end-ring with cover of same. Faded staining. Ornamentation of gold-leaf. Inner tubes with cover of red-brown "flame paper" (known as Moravian paste-paper). Objective and ocular diagrams of dark brown wood. Lens in two-piece screw-type with additional male threaded connection. Objective lens concave-convex with outer diameter 61.6-61.7 mm (circumference not perfectly circular). Inner-diameter of opening of lens mount 50mm. Diameter of aperture 24.6 mm, focal length 1739 mm. Mag 29x.

Length (open): 2335

Length (closed): 720

F-ratio:

Exit pupil:

Object status:

Objective type: singlet

Optical style

Physical style

Functional style

Materials: paper, parchment, wood, gold tooling

Drawtube data:

Drawtube notes:

Objective Data

Eyepieces

Notes: