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Le Bas, Philippe - Claude , 1669 c.+10
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Photo

photo - whole telescope
Basic Info

Maker: Le Bas, Philippe - Claude

Year: 1669 c.+10

Year Range: -

Year Notes:

Manufacturing Location: Paris, France

Signature: Le Bas

Signature Notes:

Inscriptions:

No stand present.

Collection: Adler Planetarium and Astronomy Museum

Accession #: W-179

Sources:

Project investigation and collection website

Public Notes:

Brown gold-tooled main tube, four gold-tooled green vellum draws, wooden lens cells. Maker’s name etched on objective lens.

Length (open): 1450

Length (closed): 465

F-ratio:

Exit pupil:

Object status:

Optical Basics

Objective type: singlet

Optical style

Physical style spyglass

Functional style

Materials: leather, vellum, wood, glass, gold tooling

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 0.83 ± 0.003 -0.83 ± 0.003 0.89 1125.00 33.00 1.53 61.00 ± 5
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 54.50 20.60
Lens 2 54.20
Lens 3 46.60
Lens 4 55.30
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 46.60
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 55.30
Additional Photos/Documents