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