Dodasne, Dominique, 1697
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Photo

photo - whole telescope
Basic Info

Maker: Dodasne, Dominique

Year: 1697

Year Range: -

Year Notes:

Manufacturing Location: France

Signature: Fait par / Dominique / Dodasne dit / Bruxelle .a / Mortau en / Comté de / bourgogñ

Signature Notes:

Inscriptions:

No stand present.

Collection: Coll. Willach

Accession #: 26149

Sources:

Project investigation.

Public Notes:

From the French Swiss border area, but French maker. The paper is wider combed marble. Eyepiece is made up of three equally spaced lenses held in place by small friction fit tubes. Paper tubes and paper end rings get progressively smaller. End cap covers are made of vellum. Objective cap has maker's signature "printed" in the interior. The number seven (in 1697) is written by hand, the rest of the inscription is mass produced.

Length (open): 1200

Length (closed): 280

F-ratio:

Exit pupil:

Object status:

Optical Basics

Objective type: singlet

Optical style astronomical

Physical style

Functional style

Materials: paper, glass, wood, vellum

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.:
Lens 1 1.18 845.00 29.00 23.00

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 60.00 20.00 122.00
Lens 2 60.00 20.00 118.00
Lens 3 60.00 20.00