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Collection Home > Telescopes >Galilean Single-Draws > Single-Draw Pocket Telescope
Single-Draw Pocket Telescope
| Signature | J. Gilbert, Tower Hill, London |
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| Date | Late 1700s | |||||
| Number of Draws | 1 | |||||
| Dimensions | English | Metric | ||||
| Main Tube Length | 3.3in | 84mm | ||||
| Main Tube Diameter | 1.4in | 35mm | ||||
| Total Length | 5.7in | 145mm | ||||
| Closed Length | 3.9in | 100mm | ||||
| Objective Clear Aperture Diameter | 1.2in | 30mm | ||||
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Description |
This monocular has a round parallel mahogany barrel, with a push-on objective lens cap. The original objective may have been an achromatic doublet, but it has been replaced with a pair or lenses that are not achromatic. It has one brass draw (with no retention), an eye lens, and a tapered eyecup with a sliding cover. It is signed "J*GILBERT Tower Hill LONDON" on the draw, with the eyecup to the left. |
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