The University of Arizona
College of Optical Sciences

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

 

Ivory Monocular

Signature None

Date Early 1800s
Number of Draws 2
Dimensions English Metric
Main Tube Length 2.0in 50mm
Main Tube Diameter 2.0in 50mm
Total Length 4.2in 107mm
Closed Length 2.4in 60mm
Objective Clear Aperture Diameter 1.5in 38mm

Description

This monocular has a two piece brass barrel, the forward section having a larger diameter.  Both sections are covered with a fluted material resembling ivory.  The objective lens is an achromatic doublet.  It has two brass draws (lightly gold-plated), a single eye lens, and a flared eyecup.  It is not signed by the maker.   

 


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