Mann & Ayscough, 1744
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photo - whole telescope
Basic Info

Maker: Mann & Ayscough

Year: 1744

Year Range: -

Year Notes:

Manufacturing Location: London, England

Signature: Mann & Ayscough London 1744

Signature Notes:


No stand present.

Collection: Coll. Willach

Accession #: 17147


Project investigation

Public Notes:

Galuchat (rayskin shaved and colored with red lead oxide rouge). Non-achromatic telescope with silvered end rings.

Length (open): 680

Length (closed):


Exit pupil:

Object status:

Optical Basics

Objective type: singlet

Optical style

Physical style

Functional style

Materials: brass, glass, silver, shagreen

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 19.50 11.50