Unknown, 1725 c.25
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Photo

diagram
Basic Info

Maker: Unknown

Year: 1725 c.25

Year Range: -

Year Notes:

Manufacturing Location:

Signature:

Signature Notes:

Inscriptions:

No stand present.

Collection: Adler Planetarium and Astronomy Museum

Accession #: M-452

Sources:

Project investigation notes

Public Notes:

No objective lens, no eyepiece lenses. Perhaps Italian? This is a partial telescope, only the eyepiece-end draw tube and the erector tube remain.

These remnants closed measure: length 300 mm by 52 mm diameter

Length (open):

Length (closed): 300

F-ratio:

Exit pupil:

Object status:

Optical Basics

Objective type: singlet

Optical style astronomical

Physical style

Functional style

Materials: wood, pasteboard, paper, horn

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: