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Collection Home > Telescopes > Binocular Opera Glass > Collapsible Galilean Binoculars
Collapsible Galilean Binoculars
| Signature | BTE SGDG, France |
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| Date | Late 1800s | |||||
| Dimensions | English | Metric | ||||
| Main Tube Diameter | 1.4in | 35mm | ||||
| Open Length | 2.1in | 54mm | ||||
| Closed Length | 4.4in | 112mm | ||||
| Inter-Pupilary Distance | 2.5in | 63mm | ||||
| Objective Clear Aperture Diameter | 1.2in | 30mm | ||||
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Description |
This pair of binocular opera glasses is unusual in that it collapses and stores as a single cylinder. For storage, both eye lenses as well as the frame and focusing mechanism are inserted into the two barrels of the binoculars. These two barrels then combine into a single cylinder. |
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