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Unknown, 1700 c.
Adler Planetarium and Astronomy Museum Arrow right Arrow left
Photo

photo - whole telescope
Basic Info

Maker: Unknown

Year: 1700 c.

Year Range: -

Year Notes:

Manufacturing Location: Germany

Signature:

Signature Notes:

Inscriptions:

No stand present.

Collection: Adler Planetarium and Astronomy Museum

Accession #: M-427

Sources:

Public Notes:

Brown leather covered main tube with gold tooling in lion and floral motifs. Six draw tubes covered with brown speckled paper, chipped in several places. Large turned wooden end caps at both ends. Objective lens is a replacement. Focal length of lens 1 of the eyepieces is estimated to be 58.4.

Length (open): 2300

Length (closed): 735

F-ratio:

Exit pupil:

Object status:

Optical Basics

Objective type: singlet

Optical style astronomical

Physical style

Functional style

Materials: wood, pasteboard, paper, leather, horn, glass, gold tooling

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 1.67 ± 0.002 0.60 ± 0.002 0.56 1803.00 50.00 1.52
Complete

Eyepieces

Notes:

Eyepiece 1
fD focal length (mm): free aperture (mm): full aperture (mm): s spacing (mm): CA curvature (diopters): CB curvature (diopters): M magnification: FOV field of view (degrees): Thickness:
Lens 1 61.70 29.20
Lens 2 58.40
Lens 3 51.80
Lens 4 52.60
Eyepiece 2
fD focal length (mm): free aperture (mm): full aperture (mm): s spacing (mm): CA curvature (diopters): CB curvature (diopters): M magnification: FOV field of view (degrees): Thickness:
Lens 1 51.80
Eyepiece 3
fD focal length (mm): free aperture (mm): full aperture (mm): s spacing (mm): CA curvature (diopters): CB curvature (diopters): M magnification: FOV field of view (degrees): Thickness:
Lens 1 52.60
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