Binocular Telescope
date: label: date made
content: late 19th century
notes: label: Description
content: Ever since the invention of the telescope around 1600, many opticians have considered the advantages of binocular telescopes, and some actually produced instruments of this sort. The form, however, did not become widely available until the latter decades of the19th century. This example is an aluminum instrument with aluminum sunshades. The objective lenses are about 1.6 inches diameter; the length overall, when closed, is about 11 inches. One eyepiece barrel is marked “T. W. Watson / Optician” and the other is marked “4 Pall Mall / London.” The cross frame has two knobs, one for focusing and one for adjusting the inter-ocular distance. The barrels are covered with black leather. The case is brown leather.
label: Description
content: T. W. Watson (fl. 1868 to 1884) sold guns and optical instruments.
label: Location
content: Currently not on view
place: label: place made
content: United Kingdom: England, London
setName: label: See more items in
content: Medicine and Science: Physical Sciences
label: See more items in
content: Science & Mathematics
label: See more items in
content: Optics
creditLine: label: Credit Line
content: Alasdair W. MacLeod
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1983.0515.01
label: catalog number
content: 1983.0515.01
label: accession number
content: 1983.0515
objectType: label: Object Name
content: binocular telescope
physicalDescription: label: Measurements
content: overall: 11 in; 27.94 cm
label: Measurements
content: overall in case: 11 3/8 in x 4 3/4 in x 2 3/4 in; 28.8925 cm x 12.065 cm x 6.985 cm