The University of Arizona
College of Optical Sciences

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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


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.


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The University of Arizona, 1630 East University Boulevard, Tucson, Arizona U.S.A. 85721-0094

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