Mercklein, J. S., 1761
Mathematisch-Physikalischer Salon / Staatliche Kunstsammlungen Dresden Arrow right Arrow left

photo - objective
Basic Info

Maker: Mercklein, J. S.

Year: 1761

Year Range: -

Year Notes:

Manufacturing Location: Reinharz, Germany (probable)


Signature Notes:


No stand present.

Collection: Mathematisch-Physikalischer Salon / Staatliche Kunstsammlungen Dresden

Accession #: CIF 23


Helmut Schramm, Astronomische Instrumente Katalogue, Staatlicher Mathematisch-Physikalischer Salon, Dresden, Zwinger, item 8, pg. 15. Project field work.

Public Notes:

Middle tube of wood, 3 mm thick, with cover of black fish skin. One objective-side and ocular-side pull. Both pulls as well as objective and ocular lens mounts of brass. Ocular mount with closing slide. Three lenses in revolving turret in the form of a six-sided regular prism. Objective single convex lens with engraved markings.

Length (open): 872

Length (closed): 561


Exit pupil:

Object status:

Optical Basics

Objective type: triplet

Optical style terrestrial

Physical style

Functional style

Materials: fish skin, 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 7.00 410.00 15.50
Lens 2 9.00 500.00 15.50
Lens 3 780.00 15.50