Maker: Unknown

Year: 1675 c.

Year Range: -

Year Notes:

Manufacturing Location:

Signature:

Signature Notes:

Inscriptions:

No stand present.

Collection: Optisches Museum

Accession #: 03/0077

Sources:

Project investigation.

Museum placard.

Public Notes:

Objective missing.

Eyepiece notes:
This was a 4-lens eyepiece with uneven spacing. Three starside lenses are preserved but the eye-end lens is missing.

Length (open):

Length (closed):

F-ratio:

Exit pupil:

Object status:

Objective type: singlet

Optical style terrestrial

Physical style

Functional style

Materials: lignum vitae, parchment, pasteboard, wood, glass, gold tooling

Drawtube data:

Drawtube notes:

Reverse taper. Three-lens ocular system: lenses on eyeside of Draws 1 and 2, further lens in end piece. Eye relief. Writing (printed English text) visible on starside end of Draw 3. Main barrel length without cells and end eye-relief cap. Additional length of wood eyepiece end 80 mm. Tube measurements: 288 mm (Main tube), 76 mm (draw 1), 146 mm (draw 2), 137 mm (draw 3), 150 mm (draw 4), 131 mm (draw 5), 137 mm (draw 6).

Objective Data

Eyepieces

Notes: