The University of Arizona
College of Optical Sciences

Collection Home > Telescopes > Monocular Multiple-Draw > Five-Draw Silvered Opera Glass

Other Dollond Instruments

 

Five-Draw Silvered Monocular

Signature Dollond, London

Date Early 1800s
Number of Draws 5
Dimensions English Metric
Main Tube Length 1.1in 28mm
Main Tube Diameter 1.6in 41mm
Total Length 3.5in 90mm
Closed Length 1.4in 35mm
Objective Clear Aperture Diameter 1.3in 33mm

Description

This monocular has a short round parallel brass barrel, covered with copper and an unknown silver-colored metal.  The objective lens is an achromatic doublet.  It has five brass draws (lightly silver-plated), a single eye lens, and a flat disk-shaped eyecup.  It is signed "Dollond   London" on the face of the eyecup.

 

 

 

 


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

All contents copyright 2008  Arizona Board of Regents.