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Unknown, 1670 c.
Adler Planetarium and Astronomy Museum Arrow right Arrow left
Photo

photo - whole telescope
Basic Info

Maker: Unknown

Year: 1670 c.

Year Range: -

Year Notes:

Manufacturing Location: England

Signature:

Signature Notes:

Inscriptions:

No stand present.

Collection: Adler Planetarium and Astronomy Museum

Accession #: M-429

Sources:

Public Notes:

Large diameter main barrel and ferrules covered with brown parchment tooled in gold. Parchment is badly chipped. Eight draw tubes covered with combed marbled paper. Wooden objective cap. The 83 mm diameter lens is pale yellowish in color and has beveled edges. The objective lens is missing.

Length (open): 1232

Length (closed): 674

F-ratio:

Exit pupil:

Object status:

Optical Basics

Objective type: singlet

Optical style astronomical

Physical style

Functional style

Materials: horn, leather, pasteboard, vellum, wood

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.:
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 46.00
Lens 2 49.30
Lens 3 54.80
Lens 4 50.50
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 54.80
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 50.00
Additional Photos/Documents