Unknown, Unknown
Mathematisch-Physikalischer Salon / Staatliche Kunstsammlungen Dresden Arrow right Arrow left
Photo

photo - whole telescope
Basic Info

Maker: Unknown

Year: Unknown

Year Range: -

Year Notes:

Manufacturing Location: France?

Signature:

Signature Notes:

Inscriptions:

No stand present.

Collection: Mathematisch-Physikalischer Salon / Staatliche Kunstsammlungen Dresden

Accession #: CIF 85

Sources:

Project field work.

Public Notes:

Unsigned, no markings.

Leather covered main tube, 4 draws.

Eyepiece unit draw does not come out.

Last 2 EP lens unit does come out -- friction fit.

Objective is flint forward, edge is milled, not burnished -- French?

Could measure eye piece lens 1A by pushing tube in close to objective.

Length (open):

Length (closed):

F-ratio:

Exit pupil:

Object status:

Optical Basics

Objective type: doublet (flint forward)

Optical style

Physical style

Functional style

Materials: leather, glass

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 0.75 5.02 0.00 646.10 47.00
Complete

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 26.35 24.52
Lens 2 19.00 67.00
Lens 3 95.00
Lens 4 51.52 26.00 63.00 27.54 9.41
Lens 5 38.50 14.00
Eyepiece 2
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 51.52 26.00 27.54 9.41
Eyepiece 3
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 38.50 14.00