Dollond, 1850 c.
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Photo

photo - whole telescope
Basic Info

Maker: Dollond

Year: 1850 c.

Year Range: -

Year Notes:

Manufacturing Location: England

Signature: Dollond / London

Signature Notes:

Inscriptions:

No stand present.

Collection: Louwman Collection of Historic Telescopes

Accession #: LC 187

Sources:

Tiemen Cocquyt, "400 Years of Telescopes" booklet, Zeeuws Museum, 2008. Item 24.

Louwman, P.J.K., and Zuidervaart, H.J., "A Certain Instrument for Seeing Far: Four Centuries of Styling the Telescope Illustrated by a Selection of Treasures from the Louwman Collection of Historic Telescopes". Wassenaar, 2013. p.156, #187

Public Notes:

Wood and brass construction. Tube covered with Russian leather and decorated with national and nautical flags circa 1850.

Length (open):

Length (closed): 860

F-ratio:

Exit pupil:

Object status:

Optical Basics

Objective type: singlet

Optical style

Physical style

Functional style maritime

Materials:

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 90.00

Eyepieces

Notes: