The University of Arizona
College of Optical Sciences

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Single-Draw Galilean Monocular


Date Early 1700s
Dimensions English Metric
Main Tube Length 1.6in 41mm
Main Tube Diameter 1.5in 39mm
Total Length 2.8in 70mm
Closed Length 1.9in 48mm
Objective Clear Aperture Diameter 1.2in 31mm


This small Galilean monocular has a round parallel brass barrel, covered in dark brown leather. The leather covering has a gold-colored band near the objective lens, which not achromatic. It has a flared eyecup with a large eye lens and 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

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