Unknown, 1660 c.
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Basic Info

Maker: Unknown

Year: 1660 c.

Year Range: -

Year Notes:

Manufacturing Location: Germany / France


Signature Notes:


No stand present.

Collection: Adler Planetarium and Astronomy Museum

Accession #: M-423


Project investigation

Public Notes:

Ornate, turned ivory telescope, tapering towards eyepiece end. Main tube is 57 mm in diameter, divided into four sections, with raised bands of ivory, scallop cut. One elaborate, turned end cap with small aperture plug. Objective glass present – looks like two lenses. Objective has stop that screws onto it from the outside. Eyepiece lens is held in place by brass [very light colored, possibly white] split-ring. Five ivory draws have ivory ferrules, worked in same manner as main tube. Brass erector tube is in the fifth draw. The only lens in the erector is held in place by an iron split-ring.

Length (open): 840

Length (closed): 300


Exit pupil:

Object status:

Optical Basics

Objective type: singlet

Optical style

Physical style

Functional style

Materials: ivory, glass, brass

Optical/Lab Data

Drawtube data:

Drawtube notes:

Objective Data