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Monocular Opera Glass
|Main Tube Length||1.9in||48mm|
|Main Tube Diameter||1.6in||41mm|
|Objective Clear Aperture Diameter||1.2in||30mm|
This monocular has a short round bell-shaped barrel, made of ivory. The objective lens is an achromatic doublet, contained in an ivory-covered brass cell. It has one gold-plated brass draw, a single eye lens, and a flared ivory eyecup. 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
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