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Collection Home > Telescopes > Pre-Achromatic > Octagonal Pre-Achromatic Telescope
Octagonal Pre-Achromatic Telescope
| Signature | Unsigned, English |
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| Date | Circa 1750 | |||||
| Dimensions | English | Metric | ||||
| Main Tube Length | 12.5in | 318mm | ||||
| Main Tube Diameter | 1.3in | 34mm | ||||
| Total Length | 22.5in | 572mm | ||||
| Closed Length | 13.8in | 349mm | ||||
| Objective Clear Aperture Diameter | 0.6in | 14mm | ||||
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Description |
This telescope has an octagonal parallel mahogany barrel. The brass objective lens cell has a built-in slide cover. The objective is a single non-achromatic lens and has been replaced. It has one segmented draw, a three-lens eyepiece, and a bulbous style eyecup with a slide cover. It is not signed by the maker. |
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