Unknown, 1770 c.
Coll. Willach Arrow right Arrow left
Photo

photo - whole telescope
Basic Info

Maker: Unknown

Year: 1770 c.

Year Range: -

Year Notes:

Manufacturing Location: France

Signature:

Signature Notes:

Inscriptions:

No stand present.

Collection: Coll. Willach

Accession #: 33

Sources:

Project investigation

Public Notes:

Early French achromat. Green rayskin, silver swirly decorated rings (indicating French origin). Can screw apart the doublet milled edge (also indicating French origin). English doublets do not unscrew, are burnished.

Length (open):

Length (closed):

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Exit pupil:

Object status:

Optical Basics

Objective type: doublet (unknown)

Optical style

Physical style

Functional style

Materials: shagreen, silver, glass, parchment, pasteboard

Optical/Lab Data

Drawtube data:

Drawtube notes:

Objective Data

Eyepieces

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