Double Telescope Binocular
| View Cart ⇗ | Info
An optical device, such as a pair of field glasses or opera glasses, designed for simultaneous use by both eyes and consisting of two small telescopes joined with a single focusing device.
Keywords
binoculars, device, binocular, field glasses, opera glasses, instrumentality, instrumentation, optical instrumentGalleries
Telescopes and BinocularsSource
Government Printing Office Official Gazette (Washingon, DC: Government Printing Office, 1912)
Downloads
2400×1610, 476.8 KiB
1024×686, 65.5 KiB
640×429, 31.6 KiB
320×214, 11.1 KiB