Collection Home > Telescopes >Pre-Achromatic > Pre-Achromatic Telescope
Round Pre-Achromatic Telescope
Signature | Unsigned, English | |||||
Date | Circa 1750 | |||||
Dimensions | English | Metric | ||||
Main Tube Length | 12.5in | 318mm | ||||
Main Tube Diameter | 1.3in | 34mm | ||||
Total Length | 22.0in | 559mm | ||||
Closed Length | 13.8in | 349mm | ||||
Objective Clear Aperture Diameter | 0.6in | 16mm | ||||
Description |
This telescope has a round parallel wood barrel. The brass objective lens cell has a built-in slide cover. The objective is a single non-achromatic lens. 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. |
|||||
|
|
College of Optical Sciences
The University of Arizona, 1630 East University Boulevard, Tucson, Arizona
U.S.A. 85721-0094
All contents copyright © 2008 Arizona Board of Regents.