The University of Arizona
College of Optical Sciences

Collection Home > Telescopes > Monocular Multiple-Draw > Brass Opera Glass


Brass Monocular


Number of Draws 5
Dimensions English Metric
Main Tube Length .9in 22mm
Main Tube Diameter 1.8in 45mm
Total Length 3.9in 100mm
Closed Length 1.3in 32mm
Objective Clear Aperture Diameter 1.6in 40mm


This monocular has a very short round parallel brass barrel, covered with a white material resembling ivory.  The single objective lens is non-achromatic.  It has five brass draws (lightly gold-plated), a single eye lens, and a flat disc-shaped 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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