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Collection Home > Telescopes > Binocular Opera Glass > Binocular Opera Glass
Binocular Opera Glass
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| Date | Early 1800s | |||||
| Dimensions | English | Metric | ||||
| Main Tube Length | 2.6in | 65mm | ||||
| Main Tube Diameter | 2.2in | 55mm | ||||
| Total Length | 3.7in | 95mm | ||||
| Closed Length | 2.9in | 75mm | ||||
| Inter-Pupilary Distance | 2.5in | 64mm | ||||
| Objective Clear Aperture Diameter | 1.7in | 44mm | ||||
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Description |
This pair of binoculars has curved tapered brass barrels, covered with panels of yellow-colored mother-of-pearl. The objective lenses are achromatic doublets, contained in brass cells. It has brass tubes, single eyepiece lenses, and disc-shaped eyecups, made of mother-of-pearl. The frames and all other metal parts are lightly gold-plated brass. Focusing is done with a thumbwheel. |
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U.S.A. 85721-0094
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